Artificially induced reduction of the dissipation anisotropy in high-temperature superconductors



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González Herrera, Elvira María and Villegas, J. E. and Varela del Arco, María and Santamaría Sánchez-Barriga, Jacobo and Prieto, P. and Schuller, Ivan K. and Vicent López, José Luis (2002) Artificially induced reduction of the dissipation anisotropy in high-temperature superconductors. Applied physics letters, 80 (21). pp. 3994-3996. ISSN 0003-6951

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Bi_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 magnetic fields rotating from parallel to perpendicular to the substrate. In multilayers, in a large magnetic field interval, the dissipation anisotropy is reduced as much as 60% in comparison with the most anisotropic system (Bi_2Sr_2CaCu_2O_8) and at least 50% at 30 kOe in comparison with 123 films. This strong anisotropy reduction is discussed taking into account the role played by the superlattice modulation lengths on magnetic matching effects and coupling between the superconducting layers.

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©2002 American Institute of Physics.
The authors want to thank the Spanish CICYT (MAT99-0724 and MAT2000-1468), U.S. DOE, COLCIENCIAS, New Del Amo Program, and the ESF Vortex program. One of the authors (J.E.V.) thanks the Comunidad de Madrid for a fellowship.

Uncontrolled Keywords:Axis-oriented Euba_2Cu_3O_7/PrBa_2Cu_3O_7; Critical-current density; Epitaxial deposition; Superlattices; Multilayers; Films
Subjects:Sciences > Physics > Electricity
Sciences > Physics > Electronics
Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:43896
Deposited On:20 Jul 2017 17:04
Last Modified:10 Dec 2018 14:58

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