Dynamic roughening of the magnetic flux landscape in YBa2Cu3O7-x

C.M. Aegerter, M.S. Welling and R.J. Wijngaarden

Physica A: Statistical Mechanics and its Applications, 2005, vol. 347, issue C, 363-374

Abstract: We study the magnetic flux landscape in YBa2Cu3O7-x thin films as a two dimensional rough surface. The vortex density in the superconductor forms a self-affine structure in both space and time. It is characterized by a roughness exponent α=0.76(3) and a growth exponent β=0.57(6). The roughening is caused by flux avalanches in a self-organized critical state, which is formed in the vortex matter of the superconductor. We discuss our results in the context of other roughening systems in the presence of quenched disorder.

Keywords: Roughening; Vortex matter; Quenched disorder; Edwards–Wilkinson (search for similar items in EconPapers)
Date: 2005
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:347:y:2005:i:c:p:363-374

DOI: 10.1016/j.physa.2004.08.019

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