Mixed-state Hall-effect studies in high-{ital T}{sub {ital c}}-superconducting (YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}){sub {ital n}}/(PrBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}){sub {ital m}} superlattices
- Institute of Solid State Physics, Academia Sinica, Hefei 230031 (China)
- Structure Research Laboratory, University of Science and Technology of China, Hefei 230026 (China)
- Institute of Solid State Physics, Technical University of Darmstadt, 64289 Darmstadt (Germany)
The mixed-state Hall conductivity behavior has been studied systematically on a series of superconducting (YBa{sub 2}Cu{sub 3}O{sub 7}){sub {ital n}}/(PrBa{sub 2}Cu{sub 3}O{sub 7}){sub 8} (here {ital n}=3,8,16,24,45,60) superlattices in three magnetic fields with {ital H}{parallel}{parallel}{ital c} axis and {ital H}{perpendicular}{ital J}. It was found that the Hall sign anomaly diminishes and even disappears with the decreasing of the YBCO layer thickness, i.e., the increase of the anisotropy parameter {epsilon}, and the decrease of the pinning strength. The scaling relationship between the Hall resistivity {rho}{sub {ital xy}} and the longitudinal resistivity {rho}{sub {ital xx}}, i.e., {rho}{sub {ital xy}}{proportional_to}{rho}{sub {ital xx}}{sup {alpha}} holds for all of the samples with various {epsilon}. This indicates that the anomalous Hall sign reversal is independent of the scaling law between {rho}{sub {ital xy}} and {rho}{sub {ital xx}}. The present work supports the Wang, Dong, and Ting theory which suggested that the mixed-state Hall sign anomaly originated from the backflow current due to the pinning force and the thermal fluctuations. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 279810
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 13 Vol. 53; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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