Thermally activated flux motion in high-Tc superconductors: An analytical model

doi:10.1016/0921-4534(89)90002-6

Physica C: Superconductivity

Volume 157, Issue 2, 1 February 1989, Pages 199-208

https://doi.org/10.1016/0921-4534(89)90002-6 Get rights and content

Abstract

We present an analytically exactly solvable model, based on thermally activated flux-creep, for magnetic relaxation in high-T_c superconductors. The model involves a single potential barrier which separates two pinning regions. The analytical expression derived for the magnetization M(t) gives a good description of experimental relaxation data. It also reproduces the results of Monte Carlo simulations obtained for many pinning regions. Furthermore, the two-pinning region model leads to a natural explanation of the ohmic behaviour of I–V-characteristics measured near T_c in strong magnetic fields.

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Thermally activated flux motion in high-Tc superconductors: An analytical model

Abstract

Physica C

Adv. Phys.

Phys. Rev. Lett.

Phys. Rev. Lett.

Helvetica Physica Acta

Thermally activated flux motion in high-T_c superconductors: An analytical model