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Autor Santamaría Sánchez-Barriga, Jacobo |
Documentos disponibles escritos por este autor (91)
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León Yebra, Carlos ; Lucía Mulas, María Luisa ; Santamaría Sánchez-Barriga, Jacobo ; París, M. A. ; Sanz, J. ; Várez, A. | American Physical Society | 1996-07-01Lithium ionic conductivity of Li_(0.5)La_(0.5)TiO_(3) has been studied using nuclear magnetic resonance (NMR) and admittance spectroscopy (AS) techniques. Spin-lattice relaxation and electrical conductivity relaxation are well described in terms[...]![]()
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Rivera Calzada, Alberto Carlos ; Santamaría Sánchez-Barriga, Jacobo ; León Yebra, Carlos | American Institute of Physics | 2001-01-29We report on complex admittance measurements on ZrO_(2):Y_(2)O_(3) (YSZ) thin films in the parallel plate geometry. Highly textured YSZ thin films, grown by rf sputtering, allow measuring complex admittance free of the effect of charge blocking [...]![]()
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Varignon, Julien ; Santamaría Sánchez-Barriga, Jacobo ; Bibes, Manuel | American Physical Society | 2019-03-22In transition-metal perovskites (ABO_3) most physical properties are tunable by structural parameters such as the rotation of the BO_6 octahedra. Examples include the Neel temperature of orthoferrites, the conductivity of mixed-valence manganite[...]![]()
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Liu, Yaohua ; Cuéllar Jiménez, Fabián Andrés ; Sefrioui, Zouhair ; Freeland, J. W. ; Fitzsimmons, M. R. ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; te Velthuis, S. G. E. | American Physical Society | 2013-12-11We report a strong effect of interface-induced magnetization on the transport properties of magnetic tunnel junctions consisting of ferromagnetic manganite La_(0.7)Ca_(0.3)MnO_(3) and insulating cuprate PrBa_(2)Cu_(3)O_(7). Contrary to the typic[...]![]()
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Varela del Arco, María ; Arias Serna, Diego ; Sefrioui, Zouhair ; León Yebra, Carlos ; Ballesteros, C. ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2000-11-01The effects of epitaxial strain in ultrathin YBa_(2)Cu_(3)O_(7-?) layers have been investigated by x-ray diffraction and transmission electron microscopy. The samples used were high quality [YBa_(2)Cu_(3)O_(7-?)(YBCO)_(N)/PrBa_(2)Cu_(3)O_(7)(PBC[...]![]()
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Sefrioui, Zouhair ; Arias Serna, Diego ; Morales, F. ; Varela del Arco, María ; León Yebra, Carlos ; Escudero, R. ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2001-01-01We report on transport and magnetic relaxation measurements of deoxygenated YBa_(2)Cu_(3)O_(7-?) thin films. Strongly oxygen depleted samples with ?=0.6 are produced to ensure the pure two-dimensional nature of the vortex system. Linear resistiv[...]![]()
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Nemes, Norbert Marcel ; Visani, C. ; Sefrioui, Zouhair ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Iglesias, M. ; Mompean, F. ; Gárcia Hernández, M. | American Physical Society | 2010-01We examine the interplay between ferromagnetism and superconductivity in bilayer and trilayer heterostructures based on Co, YBa_(2)Cu_(3)O_(7-?) (YBCO), and La_(0.7)Ca_(0.3)MnO_(3) (LCMO) thin films grown on SrTiO_(3) substrates with typical thi[...]![]()
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Nemes, Norbert Marcel ; Tornos, J. ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2011-10-04We report the observation between 40 and 120 K of anomalous magnetic hysteresis loops in thin epitaxial films of La_(0.7)Ca_(0.3)MnO_(3) grown on ferroelectric BaTiO_(3). These hysteresis loops display extremely unusual features: after switching[...]![]()
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Tornos Castillo, Javier ; Gallego Toledo, Fernando ; Hernández Martín, David ; Orfila Rodríguez, Gloria ; Cabero Piris, Mariona ; Cuéllar Jiménez, Fabián Andrés ; Arias Serna, Diego ; Rivera Calzada, Alberto Carlos ; Sefriuoi, Zouhair ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2019-01-22The electronic reconstruction occurring at oxide interfaces may be the source of interesting device concepts for future oxide electronics. Among oxide devices, multiferroic tunnel junctions are being actively investigated as they offer the possi[...]![]()
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León Yebra, Carlos ; Biskup Zaja, Nevenko ; Santamaría Sánchez-Barriga, Jacobo ; Alberca Carretero, Aurora ; Andrés, Amado de ; Gárcia Hernández, M. ; Munuera, C. ; Mompean, F.J. ; Nemes, Norbert Marcel | American Physical Society | 2012-10-24La0.7Ca0.3MnO3 optimally doped epitaxial films were grown on ferroelectric BaTiO3 substrates. Electronic transport (magnetoresistance and electroresistance) and magnetic properties showed important anomalies in the temperature interval between 6[...]![]()
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Sefrioui, Zouhair ; Arias Serna, Diego ; Peña, V. ; Villegas, J. E. ; Varela del Arco, María ; Prieto, P. ; León Yebra, Carlos ; Martínez, J. L. ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2003-06-13We study the interplay between magnetism and superconductivity in high-quality YBa_(2)Cu_(3)O_(7)(YBCO)/La_(0.7)Ca_(0.3)MnO_(3)(LCMO) superlattices. We find evidence for the YBCO superconductivity depression in the presence of the LCMO layers. W[...]![]()
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Peña, V. ; Sefrioui, Zouhair ; Arias Serna, Diego ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Martínez, J. L. ; te Velthuis, S. G. E. ; Hoffmann, A. | American Physical Society | 2005-02-11We show magnetoresistance in excess of 1000% in trilayers containing highly spin-polarized La_(0.7)Ca_(0.3)MnO_(3) and high-T_(c) superconducting YBa_(2)Cu_(3)O_(7). This large magnetoresistance is reminiscent of the giant magnetoresistance (GMR[...]![]()
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Liu, Yaohua ; Tornos, J. ; te Velthuis, S. G. E. ; Freeland, J. W. ; Zhou, H. ; Steadman, P. ; Bencok, P. ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Institute of Physics | 2016-04In artificial multiferroics hybrids consisting of ferromagnetic La_(0.7)Sr_(0.3)MnO_(3) (LSMO) and ferroelectric BaTiO_(3) epitaxial layers, net Ti moments are found from polarized resonant soft x-ray reflectivity and absorption. The Ti dichroic[...]![]()
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Moreno, Karla J. ; Fuentes, Antonio F. ; Maczka, Miroslaw ; Hanuza, Jerzy ; Amador, Ulises ; Santamaría Sánchez-Barriga, Jacobo ; León Yebra, Carlos | American Physical Society | 2007-05We report on the influence of oxygen order in the oxygen-ion dynamics in the ionic conductor Gd_(2)(Ti_(0.65)Zr_(0.35))_(2)O_(7). The metastable Gd_(2)(Ti_(0.65)Zr_(0.35))_(2)O_(7) powders prepared by mechanical milling present an anion-deficien[...]![]()
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Bruno, Flavio Yair ; Grisolia, M. N. ; Visani, C. ; Valencia, S. ; Varela del Arco, María ; Aburdan, R. ; Tornos, J. ; Rivera Calzada, Alberto Carlos ; Ünal, A. A. ; Pennycook, S. J. ; Sefrioui, Zouhair ; León Yebra, Carlos ; Villegas, J. E. ; Santamaría Sánchez-Barriga, Jacobo ; Barthélémy, A. ; Bibes, M. | Nature Publishing Group | 2015-02-17At interfaces between complex oxides, electronic, orbital and magnetic reconstructions may produce states of matter absent from the materials involved, offering novel possibilities for electronic and spintronic devices. Here we show that magneti[...]![]()
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Villegas, J. E. ; Sefrioui, Zouhair ; Varela del Arco, María ; González Herrera, Elvira María ; Santamaría Sánchez-Barriga, Jacobo ; Vicent López, José Luis | American Physical Society | 2004-04We study angular dependent magnetoresistance in the vortex-liquid phase of epitaxial YBa2Cu3O7 thin films and YBa_2Cu_3O_7/PrBa_2Cu_3O_7 superlattices. Superlattices were grown with different PrBa_2Cu_3O_7 thickness in order to tune coupling bet[...]![]()
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Galceran, R. ; Balcells, Ll. ; Martínez-Boubeta, C. ; Bozzo, B. ; Cisneros-Fernández, J. ; Mata, M. de la ; Magén, C. ; Arbiol, J. ; Tornos, J. ; Cuéllar Jiménez, Fabián Andrés ; Sefrioui, Zouhair ; Cebollada, A. ; Golmar, F. ; Huesos, L.E. ; Casanova, F. ; Santamaría Sánchez-Barriga, Jacobo ; Martínez, B. | American Physical Society | 2015-09-16We report on magnetotransport properties on La_(0.7)Sr_(0.3)MnO_(3)/MgO/Fe tunnel junctions grown epitaxially on top of (001)-oriented SrTiO_(3) substrates by sputtering. It is shown that the magnetoresistive response depends critically on the M[...]![]()
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Santamaría Sánchez-Barriga, Jacobo ; Lucas, M. ; Radu, F. ; Martín, E. ; Multigner, M. ; Marín Palacios, Pilar ; Hernando Grande, Antonio ; Rivero, G. | American Physical Society | 2009-11We report on the magnetic properties and the crystallographic structure of the cobalt nanowire arrays as a function of their nanoscale dimensions. X-ray diffraction measurements show the appearance of an in-plane hcp-Co phase for nanowires with [...]![]()
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Varela del Arco, María ; Sefrioui, Zouhair ; Arias Serna, Diego ; Navacerrada, M. A. ; Lucía Mulas, María Luisa ; López de la Torre, M. A. ; León Yebra, Carlos ; Loos, G. D. ; Sánchez Quesada, Francisco ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 1999-11-08The structure of high quality [YBCO_(N)/PBCO_(M)]_(1000 Å) superlattices, with N ranging between 1 and 12 unit cells and M = 5 unit cells, grown by high oxygen pressure sputtering, is analyzed. Intracell atomic structure of the layers along the [...]![]()
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Durá, O. J. ; López de la Torre, M. A. ; Vázquez, L. ; Chaboy, J. ; Boada, R. ; Rivera Calzada, Alberto Carlos ; Santamaría Sánchez-Barriga, Jacobo ; León Yebra, Carlos | American Physical Society | 2010-05-01We report on the effect of grain size on the ionic conductivity of yttria-stabilized zirconia samples synthesized by ball milling. Complex impedance measurements, as a function of temperature and frequency are performed on 10 mol % yttria-stabil[...]![]()
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Visani, C. ; Cuellar, F. ; Pérez Muñoz, Ana Mª ; Sefrioui, Zouhair ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Villegas, Javier E. | American Physical Society | 2015-07-31We experimentally study the superconducting proximity effect in high-temperature superconductor/halfmetallic ferromagnet YBa_(2)Cu_(3)O_(7)/La_(2/3)Ca_(1/3)MnO_(3) junctions, using conductance measurements. In particular, we investigate the magn[...]![]()
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Nemes, Norbert Marcel ; Visani, C. ; León Yebra, Carlos ; Gárcia Hernández, M. ; Simón, F. ; Feher, T. ; te Velthuis, S. G. E. ; Hoffmann, A. ; Santamaría Sánchez-Barriga, Jacobo | American Institute of Physics | 2010-07-19We report a memory concept utilizing ferromagnet/superconductor/ferromagnet La_(0.7)Ca_(0.3)MnO_(3)/YBa_(2)Cu_(3)O_(7)/La_(0.7)Ca_(0.3)MnO_(3) thin film hybrid structures. The orientation of the magnetic field with respect to the ferromagnetic e[...]![]()
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Prieto, P. ; Vivas, P. ; Campillo, G. ; Baca, E. ; Castro, L. F. ; Varela del Arco, María ; Ballesteros, C. ; Villegas, J. E. ; Arias Serna, Diego ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Institute of Physics | 2001-06-15We report on the magnetic and superconducting properties of La_(0.7)Ca_(0.3)MnO_(3)/YBa_(2)Cu_(3)O_(7) (LCMO/YBCO) superlattices. For a constant LCMO layer thickness of 6 unit cells (u.c.), resistance and susceptibility measurements show superco[...]![]()
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Alberca, A. ; Nemes, Norbert Marcel ; Mompean, F. J. ; Feher, T. ; Simón, F. ; Tornos, J. ; León Yebra, Carlos ; Munuera, C. ; Kirby, B. J. ; Fitzsimmons, M. R. ; Hernando Grande, Antonio ; Santamaría Sánchez-Barriga, Jacobo ; Gárcia Hernández, M. | American Physical Society | 2013-10-11The magnetism of La_(0.7)Ca_(0.3)MnO_(3) (LCMO) epitaxial thin films grown on SrTiO_(3) (STO) and BaTiO_(3) (BTO) substrates is studied using polarized neutron reflectometry (PNR) and ferromagnetic resonance (FMR) techniques. In LCMO/BTO, PNR r[...]