Long-term magnetic relaxation in high-Tc superconductors
I. M. Babich, G. P. Mikitik
DOI 10.1103/PhysRevB.48.1303 · Physical Review B
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Abstract
The long-term magnetic relaxation in high-Tc superconductors is studied theoretically. Such relaxation is described by a nonlogarithmic law. A method for its calculation is proposed, and includes an arbitrary dependence of the creep activation barrier U on the flux density B and current density j. The algorithm opens possibilities for extension of the known results obtained for magnetic relaxation in the theories of collective pinning and vortex glass to the case when U is dependent not only on j but also on B.
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