Dynamic roughening of the magnetic flux landscape in YBa$_2$Cu$_3$O$_{7-x}$

C. M. Aegerter; M. S. Welling; R. J. Wijngaarden

doi:10.1016/j.physa.2004.08.019

paper

Dynamic roughening of the magnetic flux landscape in YBa $_{2}$ Cu $_{3}$ O $_{7 - x}$

arXiv:cond-mat/0411260 · doi:10.1016/j.physa.2004.08.019

Abstract

We study the magnetic flux landscape in YBa $_{2}$ Cu $_{3}$ O $_{7 - x}$ thin films as a two dimensional rough surface. The vortex density in the superconductor forms a self-affine structure in both space and time. This is characterized by a roughness exponent $α = 0.76 (3)$ and a growth exponent $β = 0.57 (6)$ . This is due to the structure and distribution of flux avalanches in the self-organized critical state, which is formed in the superconductor. We also discuss our results in the context of other roughening systems in the presence of quenched disorder.

13 pages, 7 figures, accepted for publication in Physica A

Dynamic roughening of the magnetic flux landscape in YBa2​Cu3​O7−x​

Abstract

Dynamic roughening of the magnetic flux landscape in YBa $_{2}$ Cu $_{3}$ O $_{7 - x}$