Lockin transition, irreversibility field, and Josephson vortex penetration depth in κ-(ET)2Cu[N(CN)2]Br
| Autor: | S. Rao, F. A. B. Chaves, N. H. Tea, John A. Schlueter, Hau H. Wang, Russell W Giannetta, Urs Geiser, J. C. Garland, M. B. Salamon, Aravinda M. Kini, M. W. Trawick |
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| Rok vydání: | 1999 |
| Předmět: |
Physics
Josephson effect Flux pinning Field (physics) Condensed matter physics Lockin effect Energy Engineering and Power Technology Condensed Matter Physics Electronic Optical and Magnetic Materials Vortex Condensed Matter::Superconductivity Josephson vortex Electrical and Electronic Engineering Penetration depth Critical field |
| Zdroj: | Physica C: Superconductivity. 321:207-218 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/s0921-4534(99)00382-2 |
| Popis: | Penetration depth measurements in κ-(ET) 2 Cu[N(CN) 2 ]Br are reported for fields H up to 1 T in magnitude and arbitrary orientation. For H nearly parallel to the conducting planes, the vortex penetration depth is nonmonotonic with field, indicating a lockin effect. Qualitatively similar behavior is observed in BSCCO. The data indicate a much stronger interaction between vortex kinks than predicted. In the field range over which vortex kinks are first formed, the response is hysteretic with an irreversibility field equal to the lower critical field. Both fields show positive curvature with temperature, suggesting relaxation over surface barriers. Josephson vortices exhibit single vortex pinning below 300 Oe. Between 300 and 1500 Oe, the Josephson vortex penetration depth changes dramatically, becoming proportional to both H and to the zero field interplane penetration depth, λ ⊥ ( T )− λ ⊥ (0). |
| Databáze: | OpenAIRE |
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