Driven Vortex States and Relaxation in Single Crystal $YBa_2Cu_4O_8$

V. Metlushko; U. Welp; I. Aranson; S. Scheidl; V. M. Vinokur; G. W. Crabtree; K. Rogacki; B. Dabrowski

Driven Vortex States and Relaxation in Single Crystal $YBa_2Cu_4O_8$

Superconductivity 2019-08-17 v1

Authors: V. Metlushko , U. Welp , I. Aranson , S. Scheidl , V. M. Vinokur , G. W. Crabtree , K. Rogacki , B. Dabrowski

Abstract

The vortex response to various ac-drives has been studied in high quality $YBa_2Cu_4O_8$ single crystals. Well within the vortex solid phase a re-entrant resistive state has been observed that is characterized by long relaxation times. Pulse current response and IV characteristics reveal that in this state the driven vortex system relaxes in a way to increase t he effective pinning force. A phenomenological model accounts for the observed features, in particular the clock-wise hysteresis of the IV-curves and the increase of the apparent critical current with applied current amplitude.

Keywords

driven vortex states relaxation YBa2Cu4O8 re-entrant resistive state pinning force IV characteristics critical current

Cite

@article{arxiv.cond-mat/9804121,
  title  = {Driven Vortex States and Relaxation in Single Crystal $YBa_2Cu_4O_8$},
  author = {V. Metlushko and U. Welp and I. Aranson and S. Scheidl and V. M. Vinokur and G. W. Crabtree and K. Rogacki and B. Dabrowski},
  journal= {arXiv preprint arXiv:cond-mat/9804121},
  year   = {2019}
}

Comments

5 pages, 4 figures, submitted to PRL

Driven Vortex States and Relaxation in Single Crystal $YBa_2Cu_4O_8$

Abstract

Keywords

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