Campbell penetration depth of a superconductor in the critical state.
The magnetic penetration depth {lambda}(T,H{sub J}) was measured in the presence of a slowly relaxing supercurrent j. In single crystal Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} below approximately 25 K, {lambda}(T,H{sub J}) is strongly hysteretic. We propose that the irreversibility arises from a shift of the vortex position within its pinning well as j changes. The Campbell length depends upon the ratio j/j{sub c} where j{sub c} is the critical current defined through the Labusch parameter. Similar effects were observed in other cuprates and in an organic superconductor.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF); FOR
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 961142
- Report Number(s):
- ANL/MSD/JA-44992; TRN: US201010%%965
- Journal Information:
- Phys. Rev. B, Vol. 67, Issue 18 ; May 1, 2003; ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- ENGLISH
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