Y. Paltiel et al 2004 Europhys. Lett. 66 412 doi:10.1209/epl/i2004-10012-2
Y. Paltiel1, G. Jung1,2, Y. Myasoedov1, M. L. Rappaport1, E. Zeldov1, M. Ocio3, M. J. Higgins4 and S. Bhattacharya4,5
Show affiliationsStrong excess flux-flow voltage noise commonly observed in the vicinity of the peak effect in superconductors has recently been ascribed to a novel unconventional noise mechanism. The mechanism consists in random injection of the strongly pinned metastable disordered vortex phase through the sample edges and its subsequent random annealing into the weakly pinned ordered phase in the bulk. This results in large critical-current fluctuations causing strong vortex velocity fluctuations. In this paper we present the evidence that flux-flow noise in the peak effect regime is dominated by vortex velocity fluctuations while density fluctuations, considered in the conventional flux-flow noise models, are negligibly weak.
74.25.Op Mixed states, critical fields, and surface sheaths
74.25.Qt Vortex lattices, flux pinning, flux creep
74.40.+k Fluctuations (noise, chaos, nonequilibrium superconductivity, localization, etc.)
Issue 3 (May 2004)
Received 5 January 2004, accepted for publication 5 February 2004, in final form 5 February 2004
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C. B. Netterfield et al. 1997 ApJ 474 47
Dominic Brecher et al JHEP04(2005)004
John W Barrett and Christopher M Steele 2003 Class. Quantum Grav. 20 1341
Kou Su-peng 2001 Chinese Phys. 10 398
I Fedorov et al 1997 J. Phys.: Condens. Matter 9 5205
S Sourbron et al 2007 Phys. Med. Biol. 52 429