corner
corner
APS » Journals » Phys. Rev. B » Volume 67 » Issue 18
< Previous Article | Next Article >

Phys. Rev. B 67, 184501 (2003) [4 pages]

Campbell penetration depth of a superconductor in the critical state

Download: PDF (240 kB) Buy this article Export: BibTeX or EndNote (RIS)

R. Prozorov1,2, R. W. Giannetta1, N. Kameda3, T. Tamegai3, J. A. Schlueter4, and P. Fournier5
1Loomis Laboratory of Physics, University of Illinois at Urbana–Champaign, 1110 West Green Street, Urbana, Illinois 61801
2Department of Physics & Astronomy and USC NanoCenter, University of South Carolina, 712 Main Street, Columbia, South Carolina 29208
3Department of Applied Physics, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
4Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
5Canadian Institute of Advanced Research, Centre de Recherche sur Les Propriétés Électroniques de Matériaux Avancés, Département de Physique, Université de Sherbrooke, Sherbrooke, Québec, Canada J1K 2R1

Received 3 November 2002; published 1 May 2003

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.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.67.184501
DOI:
10.1103/PhysRevB.67.184501
PACS:
74.25.Ha
 
< Previous Article | Next Article >