2000/04/08 by R. Prozorov, Prozorov, R., R. W. Giannetta +8
Engineering · Physics and Astronomy · #FOS: Physical sciences #Fluid Dynamics and Turbulent Flows #Superconductivity (cond-mat.supr-con) #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0004122
Submitted to PRL
arxiv created 2000/04/08 · openalex publication_date 2000/04/08 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The AC magnetic penetration depth λ(T,H,j) was measured in presence of a macroscopic DC (Bean) supercurrent, j. In single crystal BSCCO below approximately 28 K, λ(T,H,j) exhibits thermal hysteresis. The irreversibility arises from a shift of the vortex position within its pinning well as j changes. It is demonstrated that below a new irreversibility temperature, the nonequilibrium Campbell length depends upon the ratio j/jc. λ(T,H,j) \it increases with j/jc as expected for a non-parabolic potential well whose curvature \it decreases with the displacement. Qualitatively similar results are observed in other high-Tc and conventional superconductors.