A pinning model and universal pinning regimes in YBa2Cu 3O7 superconducting films

Authors

Alexey V. Pan, University of WollongongFollow
Serhiy Pysarenko, University of WollongongFollow
S X. Dou, University of WollongongFollow

RIS ID

34815

Publication Details

Pan, A. V., Pysarenko, S. and Dou, S. Xue. (2010). A pinning model and universal pinning regimes in YBa₂Cu₃O₇ superconducting films. Physica C: Superconductivity and its Applications, 470 S857-S859.

Abstract

A model for vortex pinning at boundaries with modulated pinning potentials is developed for high-quality YBa₂Cu₃O₇ superconducting films and multilayers. This model accurately describes the experimentally obtained J_c(B_a) behavior in different films over the entire field and temperature (T) ranges. Deviations are observed at high fields and temperatures due to the thermally activated depinning which is not accounted for by the model. A supplementary “model-free” analysis of the temperature dependent J_c curves leads to the four regions in the field-temperature phase diagram which are attributable to the well-known pinning regimes of collective pinning theory. The results obtained indicate the universality of the pinning model developed, which incorporates the universal pinning regimes and the ability to describe J_c(B_a,T) dependences.