Vortex solid-to-liquid transition in DyBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}/(Y{sub 0.45}Pr{sub 0.55})Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} multilayers
- Departement de Physique de la Matiere Condensee, Universite de Geneve, 24 Quai E.-Ansermet, CH-1211 Geneve 4 (Switzerland)
Current-voltage ({ital I}-{ital V}) characteristics of a coupled multilayer system consisting of thin (24 A) superconducting layers of DyBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}, each separated by 96 A of (Y{sub 0.45}Pr{sub 0.55})Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} have been studied in the mixed state. Analyses of vortex glass scaling and signs of the clean system melting transition in the dynamics of our multilayers both suggest that the vortex system is close to three-dimensional for magnetic fields up to several T. Therefore, the theoretically predicted crossover when in-plane vortex correlations become more important than out-of-plane vortex correlations (occurring at a few tenths of a T in our multilayers) does not correspond to a complete decoupling of the superconducting layers in these materials. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 286082
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 54, Issue 1; Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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