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oai:docta.ucm.es:20.500.14352/520822024-08-30T16:08:13Zcom_20.500.14352_14col_20.500.14352_15

Interface barriers for flux motion in high-temperature superconducting superlattices Villegas, J. E. Sefrioui, Zouhair Varela Del Arco, María González Herrera, Elvira María Santamaría Sánchez-Barriga, Jacobo Vicent López, José Luis 538.9 537 Surface barriers Transport-properties Vortex phase Liquid-state Bi_2Sr_2CaCu_2O_8 YBa_2Cu_3O_7 Crystals Anisotropy Films Electricidad Electrónica (Física) Física de materiales Física del estado sólido 2202.03 Electricidad 2211 Física del Estado Sólido ©2004 The American Physical Society. We acknowledge financial support from Spanish CICYT through Grants Nos. MAT2002-4543 and MAT2000-1468, Grant No. CAM 07N/0008/2001, ESF-Vortex Program, and R. Areces Foundation. One of us (E.M.G.) wants to thank Ministerio de Ciencia y Tecnología for a Ramon y Cajal contract. We 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 between YBa_2Cu_3O_7 layers. While dissipation of single film and coupled superlattices is scaled with the anisotropic three-dimensional model in the whole angular range, decoupling through PrBa_2Cu_3O_7 spacer breaks down the scaling and yields strong reduction of the dissipation when the magnetic fields are applied up to ±20degrees around the interface direction. Bean-Livingston barriers at the interface are the mechanism which governs this behavior. Spanish CICYT CAM ESF-Vortex Program Ramón Areces Foundation Depto. de Estructura de la Materia, Física Térmica y Electrónica Depto. de Física de Materiales Fac. de Ciencias Físicas TRUE pub 2023-06-20T12:39:22Z 2023-06-20T12:39:22Z 2004-04 journal article https://hdl.handle.net/20.500.14352/52082 1098-0121 10.1103/PhysRevB.69.134505 eng MAT2002-4543 MAT2000-1468 07N/0008/2001 open access application/pdf American Physical Society