Campbell penetration depth of a superconductor in the critical state

Article

关键词: SINGLE-CRYSTAL;    AC RESPONSE;    FLUX-CREEP;    VORTEX;    BI2SR2CACU2O8+DELTA;    VORTICES;   

DOI  :  10.1103/PhysRevB.67.184501

来源: SCIE

【 摘 要 】

The magnetic penetration depth lambda(T,H,j) was measured in the presence of a slowly relaxing supercurrent j. In single crystal Bi2Sr2CaCu2O8 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.

【 授权许可】

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