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Publications

by André Pereira last modified Sep 30, 2012 01:27 PM

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Title: Structural and insulator-to-metal phase transition at 50 GPa in GdMnO3

 

Authors: J. Oliveira, J. A. Moreira, A. Almeida, V. H. Rodrigues, M. M. R. Costa, P. B. Tavares, P. Bouvier, M. Guennou, and J. Kreisel

 

Publication: Phys Rev B 85 (5) (2012).

 

pressure

 

Abstract:

 We present a study of the effect of very high pressure on the orthorhombic perovskite GdMnO3 by Raman spectroscopy and synchrotron x-ray diffraction up to 53 GPa. The experimental results yield a structural and insulator-to-metal phase transition close to 50 GPa, from an orthorhombic to a metrically cubic structure. The phase transition is of first order with a pressure hysteresis of about 6 GPa. The observed behavior under very high pressure might well be a general feature in rare-earth manganites.

 


List of Publications

2012:

C. Suchomski, C. Reitz, K. Brezesinski, C. T. Sousa, M. Rohnke, K. Iimura, J. P. Araujo, and T. Brezesinski. “Structural, optical, and magnetic properties of highly ordered mesoporous MCr2O4 and MCr2−xFexO4 (M = Co, Zn) spinel thin films with uniform 15 nm diameter pores and tunable nanocrystalline domain sizes.” Chemistry of Materials, 24, 155 (2012).

S. N. Kane, S. Tripathi, M. Coisson, E. S. Olivetti, P. Tiberto, F. Vinai, M. Baricco, G. Fiore, A. Apolinário, C. T. Sousa, J. P. Araujo, L. K. Varga, “Microstructure and Magnetic Properties of (Fe100-xCox)84.5Nb5B8.5P2 Alloys”, Journal of Alloys and Compounds, 536S, S337 (2012). 

C. T. Sousa, D. C. Leitão, M. P. Proença, A. Apolinário, A. M. Azevedo, N. A. Sobolev, S. A. Bunyaev, Yu. G. Pogorelov, J. Ventura, J. P. Araújo and G. N. Kakazei, “Probing the quality of Ni filled nanoporous alumina templates by magnetic techniques.” Journal of Nanoscience and Nanotechenology, 12, 7486 (2012).

J. H. Belo, A.M. Pereira, J. Ventura, G.N.P. Oliveira, P. B. Tavares, L. Fernandes, , P. A. Algarabel, C. Magen, L. Morellon, M. R. Ibarra and J.P. Araújo, "Phase Control studies in Gd5Si2Ge2 Giant Magnetocaloric Compound", Journal of Alloys and Compounds, 529, 89-95 (2012).

J. H. Belo, J. S. Amaral, A. M. Pereira, V. S. Amaral and J. P. Araújo, "On the Curie temperature dependency of the magnetocaloric effect" Appl. Phys. Lett. 100, 242407 (2012).

J. H. Belo, A. M. Pereira, C. de la Cruz, A. M. dos Santos, J. N. Gonçalves, V. S. Amaral, L. Morellon, M. R. Ibarra, P. A. Algarabel, C. Magen and J. P. Araújo, “Tailoring the Magnetism of Tb5Si2Ge2 Compounds by La Substitution", Phys. Rev. B 86, 014403 (2012);

C. Pereira, A.M. Pereira, C. Fernandes, M. Rocha, R. Mendes, M.P: Fernandez-Garcia, A. Guedes, P.B. Tavares, J.M. Greneche, J.P. Araujo and C. Freire, "Superparamagnetic MFe2O4 (M = Fe, Co, Mn) Nanoparticles: Tuning the Particle Size and Magnetic Properties through a Novel One-Step Coprecipitation Route", Chemistry of Materials 24 (8) (2012).

M.P. Proenca, C.T. Sousa, J. Ventura, M. Vazquez, and J.P. Araujo, "Distinguishing nanowires and nanotubes formation by the deposition current transients", Nanoscale Research Letters 7 (2012).

M.P. Proenca, C.T. Sousa, J. Ventura, M. Vazquez, and J.P. Araujo, "Ni growth inside ordered arrays of alumina nanopores: enhancing the deposition rate", Electrochimica Acta 72 (2012).

L. G. Vivas, M. Vazquez, J. Escrig, S. Allende, D. Altbir, D. C. Leitao, and J. P. Araujo, "Magnetic anisotropy in CoNi nanowire arrays: Analytical calculations and experiments," Phys Rev B 85 (3) (2012).

A. Tkach, A. Almeida, J. A. Moreira, M. R. Chaves, A. Espinha, and P. M. Vilarinho, "Polar behaviour induced by lithium in potassium tantalate ceramics," J Phys-Condens Mat 24 (4) (2012).

J. M. Teixeira, J. Ventura, M. P. Fernandez-Garcia, J. P. Araujo, J. B. Sousa, P. Wisniowski, D. C. Leitao, and P. P. Freitas, "Exchange biased CoFeB-MgO tunnel junctions at the onset of perpendicular anisotropy with in-plane/out-of-plane sensing capabilities," J Appl Phys 111 (5) (2012).

J. M. Teixeira, J. Ventura, M. P. Fernandez-Garcia, J. P. Araujo, J. B. Sousa, P. Wisniowski, and P. P. Freitas, "Electrode band structure effects in thin MgO magnetic tunnel junctions," Appl Phys Lett 100 (7) (2012).

M. Y. Teferi, V. S. Amaral, A. C. Lounrenco, S. Das, J. S. Amaral, D. V. Karpinsky, N. Soares, N. A. Sobolev, A. L. Kholkin, and P. B. Tavares, "Magnetoelectric coupling in multiferroic heterostructure of rf-sputtered Ni-Mn-Ga thin film on PMN-PT," J Magn Magn Mater 324 (11), 1872-1876 (2012).

C. T. Sousa, C. Nunes, M. P. Proenca, D. C. Leitao, Jlfc Lima, S. Reis, J. P. Araujo, and M. Lucio, "pH sensitive silica nanotubes as rationally designed vehicles for NSAIDs delivery," Colloids and Surfaces B-Biointerfaces 94, 288-295 (2012).

C. T. Sousa, D. C. Leitao, J. Ventura, P. B. Tavares, and J. P. Araujo, "A versatile synthesis method of dendrites-free segmented nanowires with a precise size control," Nanoscale Research Letters 7 (2012).

C. T. Sousa, A. Apolinario, D. C. Leitao, A. M. Pereira, J. Ventura, and J. P. Araujo, "Precise control of the filling stages in branched nanopores," Journal of Materials Chemistry 22 (7), 3110-3116 (2012).

Y. Romaguera-Barcelay, J. A. Moreira, A. Almeida, and J. P. de la Cruz, "Structural and electrical properties of LuMnO3 thin film prepared by chemical solution method," Thin Solid Films 520 (6), 1734-1739 (2012).

Y. Romaguera-Barcelay, J. A. Moreira, A. Almeida, J. P. Araujo, and J. P. de la Cruz, "Dimensional effects on the structure and magnetic properties of GdMnO3 thin films," Materials Letters 70, 167-170 (2012).

J. Oliveira, J. A. Moreira, A. Almeida, V. H. Rodrigues, M. M. R. Costa, P. B. Tavares, P. Bouvier, M. Guennou, and J. Kreisel, "Structural and insulator-to-metal phase transition at 50 GPa in GdMnO3," Phys Rev B 85 (5) (2012).

M. Miranda, T. Fordell, C. Arnold, A. L'Huillier, and H. Crespo, "Simultaneous compression and characterization of ultrashort laser pulses using chirped mirrors and glass wedges," Optics Express 20 (1), 688-697 (2012).

S. Decoster, U. Wahl, S. Cottenier, J. G. Correia, T. Mendonca, L. M. Amorim, L. M. C. Pereira, and A. Vantomme, "Lattice position and thermal stability of diluted As in Ge," J Appl Phys 111 (5) (2012).

L. M. Custodio, C. T. Sousa, J. Ventura, J. M. Teixeira, P. V. S. Marques, and J. P. Araujo, "Birefringence swap at the transition to hyperbolic dispersion in metamaterials," Phys Rev B 85 (16) (2012).

J. Anacleto, Jmmm de Almeida, and J. M. Ferreira, "Intrinsic symmetry of Ampere's circuital law and other educational issues," Canadian Journal of Physics 90 (1), 67-72 (2012).

 
 

2011:

M.P. Fernandez-Garcia, P. Gorria, M. Sevilla, M.P. Proenca, R. Boada, J. Chaboy, A.B. Fuertes and J.A. Blanco, "Enhanced Protection of Carbon-Encapsulated Magnetic Nickel Nanoparticles through a Sucrose-Based Synthetic Strategy," Journal of Physical Chemistry C 115 (13), 5294-5300 (2011).

F. Wahaia, G. Valusis, L. M. Bernardo, A. Almeida, J. A. Moreira, P. C. Lopes, J. Macutkevic, I. Kasalynas, D. Seliuta, R. Adomavicius, R. Henrique, and M. Lopes, "Detection of colon cancer by terahertz techniques," Journal of Molecular Structure 1006 (1-3), 77-82 (2011).

I. O. Troyanchuk, D. V. Karpinsky, M. V. Bushinsky, V. A. Khomchenko, G. N. Kakazei, J. P. Araujo, M. Tovar, V. Sikolenko, V. Efimov, and A. L. Kholkin, "Isothermal structural transitions, magnetization and large piezoelectric response in Bi1-xLaxFeO3 perovskites," Phys Rev B 83 (5) (2011).

M. Tomczyk, P. M. Vilarinho, A. Moreira, and A. Almeida, "High temperature dielectric properties of YMnO3 ceramics," J Appl Phys 110 (6) (2011).

A. Tkach, P. M. Vilarinho, and A. Almeida, "Role of initial potassium excess on the properties of potassium tantalate ceramics," Journal of the European Ceramic Society 31 (13), 2303-2308 (2011).

A. Tkach, T. M. Correia, A. Almeida, J. A. Moreira, M. R. Chaves, O. Okhay, P. M. Vilarinho, I. Gregora, and J. Petzelt, "Role of trivalent Sr substituents and Sr vacancies in tetragonal and polar states of SrTiO3," Acta Materialia 59 (14), 5388-5397 (2011).

A. Tkach, A. Almeida, J. A. Moreira, A. Espinha, M. R. Chaves, J. P. de la Cruz, and P. M. Vilarinho, "Lithium-induced dielectric relaxations in potassium tantalate ceramics," J Phys D Appl Phys 44 (31) (2011).

A. Tkach, A. Almeida, J. A. Moreira, T. M. Correia, M. R. Chaves, O. Okhay, P. M. Vilarinho, I. Gregora, and J. Petzelt, "Enhancement of tetragonality and role of strontium vacancies in heterovalent doped SrTiO3," Appl Phys Lett 98 (5) (2011).

J. M. Teixeira, J. Ventura, J. P. Araujo, J. B. Sousa, P. Wisniowski, S. Cardoso, and P. P. Freitas, "Resonant Tunneling through Electronic Trapping States in Thin MgO Magnetic Junctions," Phys Rev Lett 106 (19) (2011).

J. M. Teixeira, R. Lusche, J. Ventura, R. Fermento, F. Carpinteiro, J. P. Araujo, J. B. Sousa, S. Cardoso, and P. P. Freitas, "Versatile, high sensitivity, and automatized angular dependent vectorial Kerr magnetometer for the analysis of nanostructured materials," Review of Scientific Instruments 82 (4) (2011).

C. T. Sousa, D. C. Leitao, M. P. Proenca, A. Apolinario, J. G. Correia, J. Ventura, and J. P. Araujo, "Tunning pore filling of anodic alumina templates by accurate control of the bottom barrier layer thickness," Nanotechnology 22 (31) (2011).

J. L. Silva, H. M. Crespo, and R. Weigand, "Generation of high-energy vacuum UV femtosecond pulses by multiple-beam cascaded four-wave mixing in a transparent solid," Applied Optics 50 (14), 1968-1973 (2011).

D. S. Schmool, "Spin Dynamics in Exchange-Spring Nanosystems: A Short Review," Nanoscience and Nanotechnology Letters 3 (4), 515-530 (2011).

Y. Romaguera-Barcelay, J. A. Moreira, G. Gonzalez-Aguilar, A. Almeida, J. P. Araujo, and J. P. de la Cruz, "Synthesis of orthorhombic rare-earth manganite thin films by a novel chemical solution route," Journal of Electroceramics 26 (1-4), 44-55 (2011).

M. P. Proenca, C. T. Sousa, A. M. Pereira, P. B. Tavares, J. Ventura, M. Vazquez, and J. P. Araujo, "Size and surface effects on the magnetic properties of NiO nanoparticles," Phys Chem Chem Phys 13 (20), 9561-9567 (2011).

Y. G. Pogorelov, H. G. Silva, and J. F. Polido, "Transport processes in metal-insulator granular layers," Phys Rev B 83 (11) (2011).

Y. G. Pogorelov, M. C. Santos, and V. M. Loktev, "Impurity effects in quasiparticle spectrum of high-T-c superconductors (Review Article)," Low Temperature Physics 37 (8), 633-654 (2011).

Y. G. Pogorelov, M. C. Santos, and V. M. Loktev, "Specifics of impurity effects in ferropnictide superconductors," Phys Rev B 84 (14) (2011).

Y. G. Pogorelov, G. N. Kakazei, J. M. Teixeira, A. Hierro-Rodriguez, F. Valdes-Bango, M. Velez, J. M. Alameda, J. I. Martin, J. Ventura, and J. B. Sousa, "Magnetization processes in rectangular versus rhombic planar superlattices of magnetic bars," Phys Rev B 84 (5) (2011).

S. Pinto, A. M. Pereira, J. Ventura, J. P. Araujo, D. Hsu, and J. G. Lin, "Magnetotransport properties of La0.7Sr0.3MnO3/Nd0.6Ca0.4MnO3 superlattices up to 25 T," J Appl Phys 109 (7) (2011).

L. M. C. Pereira, U. Wahl, S. Decoster, J. G. Correia, M. R. da Silva, A. Vantomme, and J. P. Araujo, "Direct identification of interstitial Mn in heavily p-type doped GaAs and evidence of its high thermal stability," Appl Phys Lett 98 (20) (2011).

L. M. C. Pereira, U. Wahl, S. Decoster, J. G. Correia, L. M. Amorim, M. R. da Silva, J. P. Araujo, and A. Vantomme, "Mixed Zn and O substitution of Co and Mn in ZnO," Phys Rev B 84 (12) (2011).

L. M. C. Pereira, T. Som, J. Demeulemeester, M. J. Van Bael, K. Temst, and A. Vantomme, "Paramagnetism and antiferromagnetic interactions in Cr-doped GaN," J Phys-Condens Mat 23 (34) (2011).

L. M. C. Pereira, J. P. Araujo, M. J. Van Bael, K. Temst, and A. Vantomme, "Practical limits for detection of ferromagnetism using highly sensitive magnetometry techniques," J Phys D Appl Phys 44 (21) (2011).

C. Pereira, J. F. Silva, A. M. Pereira, J. P. Araujo, G. Blanco, J. M. Pintado, and C. Freire, "VO(acac)(2) hybrid catalyst: from complex immobilization onto silica nanoparticles to catalytic application in the epoxidation of geraniol," Catalysis Science & Technology 1 (5), 784-793 (2011).

C. Pereira, C. Alves, A. Monteiro, C. Magen, A. M. Pereira, A. Ibarra, M. R. Ibarra, P. B. Tavares, J. P. Araujo, G. Blanco, J. M. Pintado, A. P. Carvalho, J. Pires, M. F. R. Pereira, and C. Freire, "Designing Novel Hybrid Materials by One-Pot Co-condensation: From Hydrophobic Mesoporous Silica Nanoparticles to Superamphiphobic Cotton Textiles," Acs Applied Materials & Interfaces 3 (7), 2289-2299 (2011).

A. M. Pereira, C. Pereira, A. S. Silva, D. S. Schmool, C. Freire, J. M. Greneche, and J. P. Araujo, "Unravelling the effect of interparticle interactions and surface spin canting in gamma-Fe2O3@ SiO2 superparamagnetic nanoparticles," J Appl Phys 109 (11) (2011).

A. M. Pereira, E. Kampert, J. M. Moreira, U. Zeitler, J. H. Belo, C. Magen, P. A. Algarabel, L. Morellon, M. R. Ibarra, J. N. Goncalves, J. S. Amaral, V. S. Amaral, J. B. Sousa, and J. P. Araujo, "Unveiling the (De)coupling of magnetostructural transition nature in magnetocaloric R5Si2Ge2 (R = Tb, Gd) materials," Appl Phys Lett 99 (13) (2011).

A. M. Pereira, A. M. dos Santos, C. Magen, J. B. Sousa, P. A. Algarabel, Y. Ren, C. Ritter, L. Morellon, M. R. Ibarra, and J. P. Araujo, "Understanding the role played by Fe on the tuning of magnetocaloric effect in Tb5Si2Ge2," Appl Phys Lett 98 (12) (2011).

A. M. Pereira, J. P. Araujo, J. R. Peixoto, M. E. Braga, P. A. Algarabel, C. Magen, L. Morellon, M. R. Ibarra, and J. B. Sousa, "Electron scattering processes in Ho-5(SixGe1-x)(4) compounds: Electrical resistivity studies," Phys Rev B 83 (14) (2011).

J. Oliveira, J. A. Moreira, A. Almeida, M. R. Chaves, J. M. M. da Silva, J. B. Oliveira, M. A. Sa, P. B. Tavares, R. Ranjith, and W. Prellier, "Phase diagram of the orthorhombic, lightly lutetium doped EuMnO3 magnetoelectric system," Phys Rev B 84 (9) (2011).

J. A. Moreira, A. Almeida, W. S. Ferreira, M. R. Chaves, J. B. Oliveira, J. M. M. da Silva, M. A. Sa, S. M. F. Vilela, and P. B. Tavares, "Ferroelectricity in antiferromagnetic phases of Eu1-xYxMnO3," Solid State Communications 151 (5), 368-371 (2011).

K. J. Merazzo, D. C. Leitao, E. Jimenez, J. P. Araujo, J. Camarero, R. P. del Real, A. Asenjo, and M. Vazquez, "Geometry-dependent magnetization reversal mechanism in ordered Py antidot arrays," J Phys D Appl Phys 44 (50) (2011).

T. M. Mendonca, P. B. Tavares, J. G. Correia, A. M. L. Lopes, C. Darie, and J. P. Araujo, "The urea combustion method in the preparation of precursors for high-T-C single phase HgBa2Ca2Cu3O8+delta superconductors," Physica C-Superconductivity and Its Applications 471 (23-24), 1643-1646 (2011).

T. M. Mendonca, J. G. Correia, H. Haas, P. Odier, P. B. Tavares, M. R. da Silva, A. M. L. Lopes, A. M. Pereira, J. N. Goncalves, J. S. Amaral, C. Darie, and J. P. Araujo, "Oxygen ordering in the high-T-c superconductor HgBa2CaCu2O6+delta as revealed by perturbed angular correlation," Phys Rev B 84 (9) (2011).

T. M. Mendonca, J. G. Correia, H. Haas, P. Odier, P. B. Tavares, M. R. da Silva, A. M. L. Lopes, C. Darie, and J. P. Araujo, "Perturbed Angular Correlations Studies in the HgBa2CaCu2O6+delta high-T-C Superconductor," Journal of Superconductivity and Novel Magnetism 24 (3), 1153-1156 (2011).

P. C. Lopes, J. A. Moreira, A. Almeida, A. Esteves, I. Gregora, M. Ledinsky, J. M. Lopes, R. Henrique, and A. Oliveira, "Discriminating adenocarcinoma from normal colonic mucosa through deconvolution of Raman spectra," Journal of Biomedical Optics 16 (12) (2011).

V. M. Loktev and Y. G. Pogorelov, "Superconducting junctions from doped nonsuperconducting CuO2 layers," Phys Rev B 83 (13) (2011).

D. C. Leitao, J. Ventura, C. T. Sousa, A. M. Pereira, J. B. Sousa, M. Vazquez, and J. P. Araujo, "Insights into the role of magnetoelastic anisotropy in the magnetization reorientation of magnetic nanowires," Phys Rev B 84 (1) (2011).

D. C. Leitao, A. Apolinario, C. T. Sousa, J. Ventura, J. B. Sousa, M. Vazquez, and J. P. Araujo, "Nanoscale Topography: A Tool to Enhance Pore Order and Pore Size Distribution in Anodic Aluminum Oxide," Journal of Physical Chemistry C 115 (17), 8567-8572 (2011).

G. N. Kakazei, M. Ilyn, O. Chubykalo-Fesenko, J. Gonzalez, A. A. Serga, A. V. Chumak, P. A. Beck, B. Laegel, B. Hillebrands, and K. Y. Guslienko, "Slow magnetization dynamics and energy barriers near vortex state nucleation in circular permalloy dots," Appl Phys Lett 99 (5) (2011).

A. Goel, E. R. Shaaban, J. B. Oliveira, M. A. Sa, M. J. Pascual, and J. M. F. Ferreira, "Sintering behavior and devitrification kinetics of iron containing clinopyroxene based magnetic glass-ceramics," Solid State Ionics 186 (1), 59-68 (2011).

A. Garcia-Garcia, J. A. Pardo, P. Strichovanec, C. Magen, A. Vovk, J. M. De Teresa, G. N. Kakazei, Y. G. Pogorelov, L. Morellon, P. A. Algarabel, and M. R. Ibarra, "Tunneling magnetoresistance in epitaxial discontinuous Fe/MgO multilayers," Appl Phys Lett 98 (12) (2011).

G. H. Chandra, J. P. de la Cruz, and J. Ventura, "The influence of argon pressure and RF power on the growth of InP thin films," Semiconductor Science and Technology 26 (7) (2011).

J. Anacleto, M. G. Pereira, and J. M. Ferreira, "Dissipative work in thermodynamics," Eur J Phys 32 (1), 37-47 (2011).

J. Anacleto and J. M. Ferreira, "Symmetry of the adiabatic condition in the piston problem," Eur J Phys 32 (6), 1625-1631 (2011).

J. Anacleto, J. A. C. Anacleto, and J. M. Ferreira, "The two-piston problem revisited: Generalization from reversible to irreversible expansion," American Journal of Physics 79 (10), 1009-1014 (2011).

J. Anacleto, "On the Clausius equality and inequality," Eur J Phys 32 (2), 279-286 (2011).

 

 

2010:

 

S. Zlotnik, P. M. Vilarinho, M. E. V. Costa, J. A. Moreira, and A. Almeida, "Growth of Incipient Ferroelectric KTaO3 Single Crystals by a Modified Self-Flux Solution Method," Crystal Growth & Design 10 (8), 3397-3404 (2010).

J. Yang, R. J. Macedo, M. G. Debs, R. Ferreira, S. Cardoso, P. J. P. Freitas, J. M. Teixeira, and J. O. Ventura, "Spin Transfer on Low Resistance-Area MgO-Based Magnetic Tunnel Junctions Prepared by Ion Beam Deposition," Ieee Transactions on Magnetics 46 (6), 2002-2004 (2010).

F. Wahaia, G. Valusis, L. M. Bernardo, A. Oliveira, J. Macutkevic, I. Kasalynas, and D. Seliuta, "Detection of Colon and Rectum Cancers by Terahertz Techniques," Biophotonics: Photonic Solutions for Better Health Care Ii 7715 (2010).

J. Ventura, J. M. Teixeira, J. P. Araujo, J. B. Sousa, R. Ferreira, P. P. Freitas, J. Langer, B. Ocker, and W. Maass, "Influence of Pinholes on MgO-Tunnel Junction Barrier Parameters Obtained from Current-Voltage Characteristics," Journal of Nanoscience and Nanotechnology 10 (4), 2731-2734 (2010).

J. Ventura, J. P. Araujo, J. B. Sousa, Y. Liu, Z. Zhang, and P. P. Freitas, "Probing atomic rearrangement events in resistive switching nanostructures," Applied Physics Letters 96 (4) (2010).

J. M. Teixeira, J. Ventura, J. P. Araujo, J. B. Sousa, P. Wisniowski, and P. P. Freitas, "Tunneling processes in thin MgO magnetic junctions," Applied Physics Letters 96 (26) (2010).

J. M. Teixeira, J. Ventura, J. P. Araujo, J. B. Sousa, M. P. Fernandez-Garcia, P. Wisniowski, and P. P. Freitas, "Evidence of spin-polarized direct elastic tunneling and onset of superparamagnetism in MgO magnetic tunnel junctions," Physical Review B 81 (13) (2010).

 A. A. Soares, J. M. Ferreira, L. Caramelo, J. Anacleto, and R. P. Chhabra, "Effect of temperature-dependent viscosity on forced convection heat transfer from a cylinder in crossflow of power-law fluids," International Journal of Heat and Mass Transfer 53 (21-22), 4728-4740 (2010).

H. G. Silva and Y. G. Pogorelov, "Coherent Transport in High Performance Double Magnetic Junctions," Journal of Nanoscience and Nanotechnology 10 (4), 2917-2920 (2010).

H. G. Silva, A. M. Pereira, J. M. Teixeira, J. M. Moreira, G. N. Kakazei, J. P. Araujo, Y. G. Pogorelov, J. B. Sousa, M. E. Braga, B. Raquet, H. Rakoto, C. Gatel, E. Snoeck, S. Cardoso, and P. P. Freitas, "Magnetic field strength and orientation effects on Co-Fe discontinuous multilayers close to percolation," Physical Review B 82 (14) (2010).

C. Pereira, A. M. Pereira, P. Quaresma, P. B. Tavares, E. Pereira, J. P. Araujo, and C. Freire, "Superparamagnetic gamma-Fe2O3@SiO2 nanoparticles: a novel support for the immobilization of VO(acac)(2)," Dalton Transactions 39 (11), 2842-2854 (2010).

A. M. Pereira, J. C. Soares, J. Ventura, J. B. Sousa, J. P. Araujo, and Jcre Oliveira, "Influence of Micro-Channel Shape and Magnetic Material on the Magneto-Refrigeration Process of Integrated Circuits," Journal of Nanoscience and Nanotechnology 10 (4), 2590-2593 (2010).

A. M. Pereira, L. Morellon, C. Magen, J. Ventura, P. A. Algarabel, M. R. Ibarra, J. B. Sousa, and J. P. Araujo, "Griffiths-like phase of magnetocaloric R-5(SixGe1-x)(4) (R=Gd, Tb, Dy, and Ho)," Physical Review B 82 (17) (2010).

S. Patricio, A. I. Cruz, K. Biernacki, J. Ventura, P. Eaton, A. L. Magalhaes, C. Moura, A. R. Hillman, and C. Freire, "Novel Layer-by-Layer Interfacial Ni(salen) -Polyelectrolyte Hybrid Films," Langmuir 26 (13), 10842-10853 (2010).

T. Ostapchuk, J. Petzelt, P. Kuzel, M. Savinov, J. Hlinka, A. Tkach, P. M. Vilarinho, S. Lisenkov, I. Ponomareva, and L. Bellaiche, "Lattice dynamics in Ba0.7Sr0.3TiO3: study by THz and IR spectroscopy and ab initio simulations," Phase Transitions 83 (10-11), 955-965 (2010).

C. S. Neves, P. Quaresma, P. V. Baptista, P. A. Carvalho, J. P. Araujo, E. Pereira, and P. Eaton, "New insights into the use of magnetic force microscopy to discriminate between magnetic and nonmagnetic nanoparticles," Nanotechnology 21 (30) (2010).

J. A. Moreira, A. Almeida, W. S. Ferreira, M. R. Chaves, S. M. F. Vilela, P. B. Tavares, B. Kundys, R. Ranjith, and W. Prellier, "Effect of the external fields on the polar and dielectric properties of Eu0.8Y0.2MnO3," Journal of Applied Physics 107 (2) (2010).

J. A. Moreira, A. Almeida, W. S. Ferreira, M. R. Chaves, J. B. Oliveira, J. M. M. da Silva, M. A. Sa, S. M. F. Vilela, and P. B. Tavares, "Structure and physical properties of Eu0.8Y0.2MnO3 ceramics," Journal of Electroceramics 25 (2-4), 203-211 (2010).

J. A. Moreira, A. Almeida, W. S. Ferreira, M. R. Chaves, J. P. Araujo, A. M. Pereira, S. M. F. Vilela, and P. B. Tavares, "Polar properties and phase sequence in Eu0.8Y0.2MnO3," Journal of Physics-Condensed Matter 22 (12) (2010).

J. A. Moreira, A. Almeida, W. S. Ferreira, J. P. Araujo, A. M. Pereira, M. R. Chaves, M. M. R. Costa, V. A. Khomchenko, J. Kreisel, D. Chernyshov, S. M. F. Vilela, and P. B. Tavares, "Strong magnetoelastic coupling in orthorhombic Eu1-xYxMnO3 manganite," Physical Review B 82 (9) (2010).

J. A. Moreira, A. Almeida, W. S. Ferreira, J. E. Araujo, A. M. Pereira, M. R. Chaves, J. Kreisel, S. M. F. Vilela, and P. B. Tavares, "Coupling between phonons and magnetic excitations in orthorhombic Eu1-xYxMnO3," Physical Review B 81 (5) (2010).

 P. M. S. Monteiro and D. S. Schmool, "Magnetization dynamics in exchange-coupled spring systems with perpendicular anisotropy," Physical Review B 81 (21) (2010).

 D. C. Leitao, J. Ventura, A. M. Pereira, C. T. Sousa, J. M. Moreira, F. C. Carpinteiro, J. B. Sousa, M. Vazquez, and J. P. Araujo, "Study of Nanostructured Array of Antidots Using Pulsed Magnetic Fields," Journal of Low Temperature Physics 159 (1-2), 245-248 (2010).

D. C. Leitao, C. T. Sousa, J. Ventura, K. R. Pirota, M. Vazquez, J. B. Sousa, and J. P. Araujo, "Delocalized versus localized magnetization reversal in template-grown Ni and Ni80Fe20 nanowires," Journal of Magnetism and Magnetic Materials 322 (9-12), 1319-1322 (2010).

R. O. Kuzian, V. V. Laguta, A. M. Dare, I. V. Kondakova, M. Marysko, L. Raymond, E. P. Garmash, V. N. Pavlikov, A. Tkach, P. M. Vilarinho, and R. Hayn, "Mechanisms of magnetoelectricity in manganese-doped incipient ferroelectrics," Epl 92 (1) (2010).

V. A. Khomchenko, D. V. Karpinsky, A. L. Kholkin, N. A. Sobolev, G. N. Kakazei, J. P. Araujo, I. O. Troyanchuk, B. F. O. Costa, and J. A. Paixao, "Rhombohedral-to-orthorhombic transition and multiferroic properties of Dy-substituted BiFeO3," Journal of Applied Physics 108 (7) (2010).

 V. A. Khomchenko, G. N. Kakazei, Y. G. Pogorelov, J. P. Araujo, M. V. Bushinsky, D. A. Kiselev, A. L. Kholkin, and J. A. Paixao, "Effect of Gd substitution on ferroelectric and magnetic properties of Bi4Ti3O12," Materials Letters 64 (9), 1066-1068 (2010).

 G. N. Kakazei, N. M. Santos, C. Quiros, M. Velez, J. I. Martin, J. M. Alameda, V. O. Golub, O. Y. Saliuk, Y. G. Pogorelov, J. B. Sousa, M. C. Carmo, and N. A. Sobolev, "Magnetic properties of amorphous Co0.74Si0.26/Si multilayers with different numbers of periods," Low Temperature Physics 36 (8-9), 821-825 (2010).

I. T. Gomes, A. M. Pereira, J. Ventura, F. Carpinteiro, J. M. Moreira, J. P. Araujo, J. Barbosa, and B. G. Almeida, "High-Field Magnetoresistance of La0.67Sr0.33MnO3 Thin Films Deposited on LiNbO3 Substrates," Journal of Low Temperature Physics 159 (1-2), 156-159 (2010).

I. T. Gomes, B. G. Almeida, A. M. L. Lopes, J. P. Araujo, J. Barbosa, and J. A. Mendes, "Structural and magnetic characterization of LaSrMnO3 thin films deposited by laser ablation on MgO substrates," Journal of Magnetism and Magnetic Materials 322 (9-12), 1174-1177 (2010).

 V. Goian, S. Kamba, C. Kadlec, D. Nuzhnyy, P. Kuzel, J. A. Moreira, A. Almeida, and P. B. Tavares, "THz and infrared studies of multiferroic hexagonal Y1-xEuxMnO3 (x=0-0.2) ceramics," Phase Transitions 83 (10-11), 931-941 (2010).

 M. P. Fernandez-Garcia, P. Gorria, J. A. Blanco, A. B. Fuertes, M. Sevilla, R. Boada, J. Chaboy, D. Schmool, and J. M. Greneche, "Microstructure and magnetism of nanoparticles with gamma-Fe core surrounded by alpha-Fe and iron oxide shells," Physical Review B 81 (9) (2010).

M. P. Fernandez, D. S. Schmool, A. S. Silva, M. Sevilla, A. B. Fuertes, P. Gorria, and J. A. Blanco, "Control of crystalline phases in magnetic Fe nanoparticles inserted inside a matrix of porous carbon," Journal of Magnetism and Magnetic Materials 322 (9-12), 1300-1303 (2010).

S. Decoster, S. Cottenier, U. Wahl, J. G. Correia, L. M. C. Pereira, C. Lacasta, M. R. Da Silva, and A. Vantomme, "Diluted manganese on the bond-centered site in germanium," Applied Physics Letters 97 (15) (2010).

 N. de Sousa, A. Apolinario, F. Vernay, P. M. S. Monteiro, F. Albertini, F. Casoli, H. Kachkachi, and D. S. Schmool, "Spin configurations in hard/soft coupled bilayer systems: Transitions from rigid magnet to exchange-spring," Physical Review B 82 (10) (2010).

S. Das, J. S. Amaral, and V. S. Amaral, "Handling mixed-state magnetization data for magnetocaloric studies-a solution to achieve realistic entropy behaviour," Journal of Physics D-Applied Physics 43 (15) (2010).

J. M. Coelho, J. A. Moreira, A. Almeida, and F. J. Monteiro, "Synthesis and characterization of HAp nanorods from a cationic surfactant template method," Journal of Materials Science-Materials in Medicine 21 (9), 2543-2549 (2010).

 A. A. Awad, K. Y. Guslienko, J. F. Sierra, G. N. Kakazei, V. Metlushko, and F. G. Aliev, "Precise probing spin wave mode frequencies in the vortex state of circular magnetic dots," Applied Physics Letters 96 (1) (2010).

 A. A. Awad, G. R. Aranda, D. Dieleman, K. Y. Guslienko, G. N. Kakazei, B. A. Ivanov, and F. G. Aliev, "Spin excitation frequencies in magnetostatically coupled arrays of vortex state circular Permalloy dots," Applied Physics Letters 97 (13) (2010).

J. Anacleto and J. M. Ferreira, "Minimizing the generation of entropy: which sequence of reservoirs to choose?," European Journal of Physics 31 (1), L1-L4 (2010).

 J. Anacleto, "Work reservoirs in thermodynamics," European Journal of Physics 31 (3), 617-624 (2010).

 A. Alija, D. P. de Lara, E. M. Gonzalez, G. N. Kakazei, J. B. Sousa, J. P. Araujo, A. Hierro-Rodriguez, J. I. Martin, J. M. Alameda, M. Velez, and J. L. Vicent, "Ferromagnetic proximity effect in a-CoxSi1-x/Nb bilayers: Role of magnetic disorder and interface transparency," Physical Review B 82 (18) (2010).

 

2009:

R. Weigand, J. T. Mendonca, and H. M. Crespo, "Cascaded nondegenerate four-wave-mixing technique for high-power single-cycle pulse synthesis in the visible and ultraviolet ranges," Physical Review A 79 (6) (2009).

L. T. Tsymbal, G. N. Kakazei, and Y. B. Bazaliy, "Single-domain-wall states in millimeter-scale samples of ErFeO3," Physical Review B 79 (9) (2009).

I. G. Trindade, J. Oliveira, R. Fermento, J. B. Sousa, S. Cardoso, P. P. Freitas, A. Raghunathan, and J. E. Snyder, "Soft Thin Films for Flux Concentrators," Ieee Transactions on Magnetics 45 (1), 168-171 (2009).

I. G. Trindade, D. C. Leitao, Y. Pogorelov, J. B. Sousa, R. C. Chaves, S. Cardoso, and P. P. Freitas, "Control of hysteretic behavior in flux concentrators," Applied Physics Letters 94 (7) (2009).

I. G. Trindade, D. Leitao, R. Fermento, Y. Pogorelev, and J. B. Sousa, "Electron scattering characteristics of polycrystalline metal transition films by in-situ electrical resistance measurements," Journal of Magnetism and Magnetic Materials 321 (16), 2494-2498 (2009).

I. G. Trindade, R. Fermento, D. Leitao, and J. B. Sousa, "A method to investigate the electron scattering characteristics of ultrathin metallic films by in situ electrical resistance measurements," Review of Scientific Instruments 80 (7) (2009).

I. G. Trindade, R. Fermento, D. Leitao, and J. B. Sousa, "A method to investigate the electron scattering characteristics of ultrathin metallic films by in situ electrical resistance measurements," Rev Sci Instrum 80 (7), 073909 (2009).

P. Toulemonde, C. Darie, C. Goujon, M. Legendre, T. Mendonca, M. Alvarez-Murga, V. Simonet, P. Bordet, P. Bouvier, J. Kreisel, and M. Mezouar, "Single crystal growth of BiMnO3 under high pressure-high temperature," High Pressure Research 29 (4), 600-604 (2009).

E. Titus, M. K. Singh, G. Cabral, V. Paserin, P. R. Babu, W. J. Blau, J. Ventura, J. P. Araujo, and J. Gracio, "Fabrication of vertically aligned carbon nanotubes for spintronic device applications," Journal of Materials Chemistry 19 (39), 7216-7221 (2009).

J. M. Teixeira, J. Ventura, R. Fermento, J. P. Araujo, J. B. Sousa, P. Wisniowski, and P. P. Freitas, "Electroforming, magnetic and resistive switching in MgO-based tunnel junctions," Journal of Physics D-Applied Physics 42 (10) (2009).

J. M. Teixeira, J. Ventura, F. Carpinteiro, J. P. Araujo, J. B. Sousa, P. Wisniowski, and P. P. Freitas, "The effect of pinhole formation/growth on the tunnel magnetoresistance of MgO-based magnetic tunnel junctions," Journal of Applied Physics 106 (7) (2009).

C. T. Sousa, A. M. L. Lopes, M. P. Proenca, D. C. Leitao, J. G. Correia, and J. P. Araujo, "Rapid Synthesis of Ordered Manganite Nanotubes by Microwave Irradiation in Alumina Templates," Journal of Nanoscience and Nanotechnology 9 (10), 6084-6088 (2009).

A. A. Soares, J. Anacleto, L. Caramelo, J. M. Ferreira, and R. P. Chhabra, "Mixed Convection From a Circular Cylinder to Power Law Fluids," Industrial & Engineering Chemistry Research 48 (17), 8219-8231 (2009).

J. L. Silva, R. Weigand, and H. M. Crespo, "Octave-spanning spectra and pulse synthesis by nondegenerate cascaded four-wave mixing," Optics Letters 34 (16), 2489-2491 (2009).

H. G. Silva and Y. G. Pogorelov, "Temperature and voltage effects in high performance magnetic junctions," Physica Status Solidi C - Current Topics in Solid State Physics, Vol 6, No 10 6 (10), 2150-2155 (2009).

H. G. Silva and Y. G. Pogorelov, "Matrix description of magnetotransport in perfect multilayered structures," Journal of Physics D-Applied Physics 42 (19) (2009).

H. G. Silva, H. L. Gomes, Y. G. Pogorelov, L. M. C. Pereira, G. N. Kakazei, J. B. Sousa, J. P. Araujo, J. F. L. Mariano, S. Cardoso, and P. P. Freitas, "Magnetic and transport properties of diluted granular multilayers," Journal of Applied Physics 106 (11) (2009).

H. Silva, H. L. Gomes, Y. G. Pogorelov, P. Stallinga, D. M. de Leeuw, J. P. Araujo, J. B. Sousa, S. C. J. Meskers, G. Kakazei, S. Cardoso, and P. P. Freitas, "Resistive switching in nanostructured thin films," Applied Physics Letters 94 (20) (2009).

D. L. Rocco, J. S. Amaral, J. V. Leitao, V. S. Amaral, M. S. Reis, R. P. Fernandes, A. M. Pereira, J. P. Araujo, N. V. Martins, P. B. Tavares, and A. A. Coelho, "Percolation processes and spin-reorientation of PrNi5-xCox," Physical Review B 79 (1) (2009).

D. L. Rocco, J. S. Amaral, J. V. Leitao, V. S. Amaral, M. S. Reis, S. Das, R. P. Fernandes, J. P. Araujo, A. M. Pereira, P. B. Tavares, N. V. Martins, and A. A. Coelho, "High refrigerant capacity of PrNi5-xCox magnetic compounds exploiting its spin reorientation and magnetic transition over a wide temperature zone," Journal of Physics D-Applied Physics 42 (5) (2009).

C. Ritter, C. Magen, L. Morellon, P. A. Algarabel, M. R. Ibarra, A. M. Pereira, J. P. Araujo, and J. B. Sousa, "Magnetic and crystal structure of Ho-5(SixGe(1-x))(4) studied by neutron diffraction," Physical Review B 80 (10) (2009).

J. Perez, P. M. Vilarinho, A. L. Kholkin, and A. Almeida, "Sol-gel reaction stability studied: Influence in the formation temperature and properties of ferroelectric thin films," Materials Research Bulletin 44 (3), 515-521 (2009).

J. A. Moreira, A. Almeida, W. S. Ferreira, M. R. Chaves, B. Kundys, R. Ranjith, W. Prellier, S. M. F. Vilela, and P. B. Tavares, "Polar properties of Eu0.6Y0.4MnO3 ceramics and their magnetic field dependence," Journal of Physics-Condensed Matter 21 (44) (2009).

V. A. Khomchenko, D. A. Kiselev, M. Kopcewicz, M. Maglione, V. V. Shvartsman, P. Borisov, W. Kleemann, A. M. L. Lopes, Y. G. Pogorelov, J. P. Araujo, R. M. Rubinger, N. A. Sobolev, J. M. Vieira, and A. L. Kholkin, "Doping strategies for increased performance in BiFeO3," Journal of Magnetism and Magnetic Materials 321 (11), 1692-1698 (2009).

X. K. He, M. Miranda, J. Schwenke, O. Guilbaud, T. Ruchon, C. Heyl, E. Georgadiou, R. Rakowski, A. Persson, M. B. Gaarde, and A. L'Huillier, "Spatial and spectral properties of the high-order harmonic emission in argon for seeding applications," Physical Review A 79 (6) (2009).

T. Fordell, M. Miranda, A. Persson, and A. L'Huillier, "Carrier-envelope phase stabilization of a multi-millijoule, regenerative-amplifier-based chirped-pulse amplifier system," Optics Express 17 (23), 21091-21097 (2009).

H. Crespo and R. Weigand, "Cascaded four-wave mixing technique for high-power few-cycle pulse generation," Ultrafast Phenomena Xvi 92, 795-797 (2009).

J. F. Collingwood, S. B. Palmer, M. R. Lees, C. Edwards, J. A. Santos, J. B. Sousa, and D. C. Jiles, "Ferro I phase and gadolinium," Physical Review B 79 (10) (2009).

P. S. Carvalho, F. Figueiras, S. Mendonca, C. M. Pereira, and M. Rodrigues, "Dielectric Relaxation and Optical Transmittance of PVC Membranes Modified by Nematic Liquid Crystal," International Journal of Polymeric Materials 58 (11), 588-603 (2009).

J. Barbosa, B. G. Almeida, J. A. Mendes, D. Leitao, and J. P. Araujo, "Influence of Grain Size Dispersion on the Magnetic Properties of Nanogranular BaTiO3-CoFe2O4 Thin Films," Journal of Nanoscience and Nanotechnology 9 (6), 3742-3746 (2009).

J. Anacleto and M. G. Pereira, "Adiabatic process reversibility: microscopic and macroscopic views," European Journal of Physics 30 (3), L35-L40 (2009).

J. Anacleto and M. G. Pereira, "From free expansion to abrupt compression of an ideal gas," European Journal of Physics 30 (1), 177-183 (2009).

J. Anacleto, J. M. Ferreira, and A. A. Soares, "When an adiabatic irreversible expansion or compression becomes reversible," European Journal of Physics 30 (3), 487-495 (2009).

A. A. Amorim, M. V. Tognetti, P. Oliveira, J. L. Silva, L. M. Bernardo, F. X. Kartner, and H. M. Crespo, "Sub-two-cycle pulses by soliton self-compression in highly nonlinear photonic crystal fibers," Optics Letters 34 (24), 3851-3853 (2009).

F. G. Aliev, J. F. Sierra, A. A. Awad, G. N. Kakazei, D. S. Han, S.K. Kim, V. Metlushko, B. Ilic, and K. Y. Guslienko, "Spin waves in circular soft magnetic dots at the crossover between vortex and single domain state," Physical Review B 79 (17) (2009).

 


 

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