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Campbell Penetration Depth of a Superconductor in the Critical State | R. Prozorov
; R. W. Giannetta
; N. Kameda
; T. Tamegai
; J. A. Schlueter
; P. Fournier
; | Date: |
3 Nov 2002 | Journal: | Phys. Rev. B 67, 184501 (2003) | Subject: | Superconductivity | cond-mat.supr-con | Abstract: | The magnetic penetration depth $lambda(T,H,j)$ was measured in the presence of a slowly relaxing supercurrent, $j$. In single crystal $mathrm{Bi_2Sr_2CaCu_2O_8}$ below approximately 25 K, $lambda(T,H,j)$ 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 $j/j_{c}$ where $j_{c}$ is the critical current defined through the Labusch parameter. Similar effects were observed in other cuprates and in an organic superconductor. | Source: | arXiv, cond-mat/0211047 | Services: | Forum | Review | PDF | Favorites |
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