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Varela del Arco, María ; Arias Serna, Diego ; Sefrioui, Zouhair ; León Yebra, Carlos ; Ballesteros, C. ; Pennycook, S. J. ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2002-10-01We report the effects of epitaxial strain and deoxygenation on high quality [YBa_(2)Cu_(3)O_(7-x)(YBCO)_(N) /PrBa_(2)Cu_(3)O_(7)(PBCO)_(5)]_(1000 Å) superlattices, with 1texto impreso
Varela del Arco, María ; Grogger, W. ; Arias Serna, Diego ; Sefrioui, Zouhair ; León Yebra, Carlos ; Ballesteros, C. ; Frishnan, K.M. ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2001-05-28Charge neutrality and stoichiometry impose severe restrictions on the mechanisms of epitaxial growth of complex oxides. The fundamental question arises of what is the minimum growth unit when sample thickness is reduced beyond the size of the un[...]texto impreso
Varela del Arco, María ; Grogger, W. ; Arias Serna, Diego ; Sefrioui, Zouhair ; León Yebra, Carlos ; Vázquez, L. ; Ballesteros, C. ; Krishnan, K.M. ; Santamaría Sánchez-Barriga, Jacobo | American Physical Society | 2002-11-01We report on the growth mechanism of YBa_(2)Cu_(3)O_(7-x). Our study is based on an analysis of ultrathin YBa_(2)Cu_(3)O_(7-x) (YBCO) layers in c-axis-oriented YBa_(2)Cu_(3)O_(7-x)/PrBa_(2)Cu_(3)O_(7)superlattices. We have found that the release[...]texto impreso
López de la Torre, M. A. ; Sefrioui, Zouhair ; Arias Serna, Diego ; Varela del Arco, María ; Villegas, J. E. ; Ballesteros, C. ; León Yebra, Carlos | American Physical Society | 2001-01-05We report on the effect of light ion irradiation on the low-temperature electrical resistivity of ferromagnetic SrRuO_(3) thin films. Fresh samples displayed a ferromagnetic transition at T_(c)? 160 K, good metallic behavior (?(300 K)~400??cm, d[...]texto impreso
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[...]texto impreso
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[...]
