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Phys. Rev. B 73, 214521 (2006) [4 pages]

Metastable behavior of vortex matter in the electronic transport processes of homogenous superconductors

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X. B. Xu1,*, Y. Liu1, H. Fangohr2, L. Zhang1, S. Y. Ding1,3, Z. H. Wang1, S. L. Liu1, G. J. Wu1, and H. M. Shao1
1National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing 210093, People’s Republic of China
2Department of Electronics and Computer Science, University of Southampton, Southampton SO17 1BJ, United Kingdom
3Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW 2522, Australia

Received 19 February 2006; revised 16 April 2006; published 23 June 2006

We study numerically the effect of vortex pinning on the hysteresis voltage-temperature (V-T) loop of vortex matter. It is found that different types of the V-T loops result from different densities of vortex pinning center. An anticlockwise V-T loop is observed for the vortex system with dense pinning centers, whereas a clockwise V-T loop is brought about for vortices with dilute pinning centers. It is shown that the size of the V-T loop becomes smaller for lower experimental speed, higher magnetic field, or weak pinning strength. Our numerical observation is in good agreement with experiments.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.73.214521
DOI:
10.1103/PhysRevB.73.214521
PACS:
74.25.Fy, 74.25.Qt

*Corresponding author. Email address: xxb@nju.edu.cn

 
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