Campbell penetration depth of a superconductor in the critical state
R. Prozorov, R. W. Giannetta, N. Kameda, T. Tamegai, J. A. Schlueter, P. Fournier
DOI 10.1103/PhysRevB.67.184501 · Physical Review B
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Abstract
The magnetic penetration depth λ(T,H,j) was measured in the presence of a slowly relaxing supercurrent j. In single crystal Bi2Sr2CaCu2O8 below approximately 25 K, λ(T,H,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/jc where jc is the critical current defined through the Labusch parameter. Similar effects were observed in other cuprates and in an organic superconductor.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92 | Pressure not reported | unknown |
| Pr1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 24 | Pressure not reported | unknown |
| (ET)2SF5CH2CF2SO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 5 | Pressure not reported | unknown |
| Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 9.3 | Pressure not reported | unknown |
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