The low-frequency response in the surface superconducting state of ZrB$_{12}$ single crystal}

Details The low-frequency response in the surface superconducting state of ZrB$_{12}$ single crystal} The low-frequency response in the surface superconducting state of ZrB$_{12}$ single crystal}

2004-10-14

arxiv.org/abs/cond-mat/0410356v1

Physics

Condensed Matter

Superconductivity

7 pages, 11 figures

Scientific paper

10.1103/PhysRevB.71.064506

The large nonlinear response of a single crystal ZrB$_{12}$ to an ac field (frequency 40 - 2500 Hz) for $H_0>H_{c2}$ has been observed. Direct measurements of the ac wave form and the exact numerical solution of the Ginzburg-Landau equations, as well as phenomenological relaxation equation, permit the study of the surface superconducting states dynamics. It is shown, that the low frequency response is defined by transitions between the metastable superconducting states under the action of an ac field. The relaxation rate which determines such transitions dynamics, is found.

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