Información del autor
Documentos disponibles escritos por este autor (91)
Añadir el resultado a su cesta Hacer una sugerencia Refinar búsqueda
texto impreso
Bruno, F. Y. ; Tornos, J. ; Gutierrez del Olmo, M. ; Sánchez Santolino, G. ; Nemes, N.M. ; Gárcia Hernández, M. ; Méndez Martín, Bianchi ; Piqueras de Noriega, Javier ; Antorrena, G. ; Morellon, L. ; De Teresa, J. M. ; Clement, M. ; Iborra, E. ; León, C. ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2011-06-23Metallic surface layers are fabricated by doping (100) SrTiO_3 (STO) single crystals with oxygen vacancies generated by bombardment with Ar ions from an rf plasma source. The presence of oxygen vacancies is confirmed by cathodoluminescence and x[...]texto impreso
González Herrera, Elvira María ; Villegas, J. E. ; Varela del Arco, María ; Santamaría Sánchez-Barriga, Jacobo ; Prieto, P. ; Schuller, Ivan K. ; Vicent López, José Luis | American Institute of Physics | 2002-05-27Bi_2Sr_2CaCu_2O_8, RBa_2Cu_3O_7 (R=Y, Eu) thin films and RBa_2Cu_3O_7/PrBa_2Cu_3O_7 superlattices have been fabricated by sputtering technique. The anisotropic dissipation was measured close to the critical temperatures with high applied magneti[...]texto impreso
Díaz Guillén, M. R. ; Moreno, K. J. ; Díaz Guillén, J. A. ; Fuentes, A .F. ; Naval, K. L. Ngai ; Garcia Barriocanal, Javier ; Santamaría Sánchez-Barriga, Jacobo ; León Yebra, Carlos | American Physical Society | 2008-09In this work we evaluate the effect of cation size on the dc activation energy needed for oxygen ion migration, E_(dc), in highly disordered pyrochlore-type ionic conductors A_(2)B_(2)O_(7). Twenty six compositions with the general formula, Ln_([...]texto impreso
Mártil de la Plaza, Ignacio ; González Díaz, Germán ; Hernández Rojas, J. L. ; Lucía Mulas, María Luisa ; Sánchez Quesada, Francisco ; Santamaría Sánchez-Barriga, Jacobo | Amer Inst Physics | 1992-04-13CuGaxIn1-xSe2 thin films have been deposited by rf sputtering from three targets with different (Ga,In) content (x = 0.25, x = 0.5, and x = 0.75). A structural, compositional, optical, and electrical study has been carried out for films grown at[...]texto impreso
texto impreso
Salafranca, Juan ; Rincón, Julián ; Tornos Castillo, Javier ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Dagotto, Elbio ; Pennycook, Stephen J. ; Varela del Arco, María | American Physical Society | 2014-05-14Here we study the electronic properties of cuprate-manganite interfaces. By means of atomic resolution electron microscopy and spectroscopy, we produce a subnanometer scale map of the transition metal oxidation state profile across the interface[...]texto impreso
González Merchante, Daniel ; Cortés Gil, Raquel ; Alonso Rodríguez, José María ; Matesanz Sáez, Emilio ; Rivera Calzada, Alberto Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Ruiz González, María Luisa ; González Calbet, José María | International Union of Crystallography | 2019-07Ruddlesden-Popper oxides, (AO)(ABO_3))_n, occupy a prominent place in the landscape of materials research because of their intriguing potential applications. Compositional modifications to the cation sublattices, A or B, have been explored in or[...]texto impreso
Peña, V. ; Rivera Calzada, Alberto Carlos ; Garcia Barriocanal, Javier ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; García González, E. ; González Calbet, J. M. | Sociedad Española de Cerámica y Vidrio | 2004-01Presentamos medidas de la conductividad eléctrica del sistema BIFEVOX Bi_(4)V_(2-x)Fe_(x)O_(11-y)(0?x?0.9;0?y?1), en el que se realiza la sustitución de iones V (IV) por Fe (III) de forma sistemática. La conductividad muestra un comportamiento p[...]texto impreso
Hernández Martín, David ; Gallego Toledo, Fernando ; Tornos Castillo, Javier ; Rouco Gómez, Víctor ; Beltrán Finez, Juan Ignacio ; Munuera, C. ; Sánchez Manzano, David ; Cabero Piris, Mariona ; Cuéllar Jiménez, Fabián Andrés ; Arias Serna, Diego ; Sánchez Santolino, Gabriel ; Mompean, F. J. ; Gárcia Hernández, M. ; Rivera Calzada, Alberto Carlos ; Pennycook, S. J. ; Varela del Arco, María ; Muñoz, M. C. ; Sefrioui, Zouhair ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2020-12-30The persistence of ferroelectricity in ultrathin layers relies critically on screening or compensation of polarization charges which otherwise destabilize the ferroelectric state. At surfaces, charged defects play a crucial role in the screening[...]texto impreso
Moreno, K. J. ; Mendoza-Suárez, G. ; Fuentes, A. F. ; Garcia Barriocanal, Javier ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2005-04-22We report on dispersive conductivity measurements in the oxygen ion conductor Gd_(2)(Ti_(2?y)Zr_(y))O_(7). Increasing Zr content leads to higher concentration of oxygen vacancies and results in higher activation energies for long-range ion trans[...]texto impreso
León Yebra, Carlos ; Lucía Mulas, María Luisa ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 1997-01-01A study of the effect of correlated ion motion on the electrical conductivity relaxation in single-crystalline yttria-stabilized zirconia is presented. Complex admittance in the radio frequency range show power-law dependencies in the real part[...]texto impreso
Peña, V. ; Sefrioui, Zouhair ; Arias Serna, Diego ; León Yebra, Carlos ; Santamaría Sánchez-Barriga, Jacobo ; Varela del Arco, María ; Pennycook, S. J. ; Martínez, J. L. | American Physical Society | 2004-06-08Here we examine the ferromagnetic/superconducting proximity effect in half-metallic ferromagnetic La_(0.7)Ca_(0.3)MnO_(3) and high-T_(c) superconducting YBa_(2)Cu_(3)O_(7) artificial structures. We have found experimental evidence for the coupli[...]texto impreso
Lucía Mulas, María Luisa ; Sánchez Quesada, Francisco ; Santamaría Sánchez-Barriga, Jacobo ; Sefrioui, Zouhair ; Arias Serna, Diego ; Loos, G. ; Navacerrada, M.A. | Amer Inst Physics | 2000-05-29We have studied the effect of He+ irradiation with doses in the range 10(12)-2x10(15) cm(-2) on two high-temperature superconducting structures: YBa2Cu3O7-x (YBCO) films and YBa2Cu3O7-x/PrBa2Cu3O7 (YBCO/PBCO) superlattices. In particular we have[...]texto impreso
Rivera Calzada, Alberto Carlos ; León Yebra, Carlos ; Sanz, J. ; Santamaría Sánchez-Barriga, Jacobo ; Moynihan, C. T. ; Ngai, K. L. | American Physical Society | 2002-06-10Electrical conductivity measurements of the fast ionic conductor Li_(0.18)La_(0.61)TiO_(3) have been conducted at temperatures ranging from 8 to 300 K and frequencies between 20 Hz and 5 MHz. A detailed analysis of the ac conductivity shows the [...]texto impreso
Sefrioui, Zouhair ; Arias Serna, Diego ; Varela del Arco, María ; Villegas, J. E. ; López de la Torre, M. A. ; León Yebra, Carlos ; Loos, G. D. ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 1999-12-01Current-voltage (I-V) characteristics were used to investigate the response of the vortex-glass (VG) phase transition in high-quality epitaxial YBa_(2)Cu_(3)O_(7-?) films in magnetic fields up to 7 T. We show that varying the oxygen content, the[...]
