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Flux cutting in high-Tc superconductors

V. Vlasko-Vlasov, A. Koshelev, A. Glatz, C. Phillips, U. Welp, and W. Kwok
Phys. Rev. B 91, 014516 – Published 30 January 2015

Abstract

We performed a magneto-optical study of flux distributions in yttrium barium copper oxide (YBCO) crystal under various applied crossed field orientations to elucidate the complex nature of magnetic flux cutting in superconductors. Our work reveals unusual vortex patterns induced by the interplay between flux cutting and vortex pinning. We observe strong flux penetration anisotropy of the normal flux B in the presence of an in-plane field H|| and associate the modified flux dynamics with the staircase structure of tilted vortices in YBCO and the flux-cutting process. We demonstrate that flux cutting can effectively delay vortex entry in the direction transverse to H||. Finally, we elucidate details of the vortex cutting and reconnection process using time-dependent Ginzburg-Landau simulations.

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  • Received 18 December 2014
  • Revised 12 January 2015

DOI:https://doi.org/10.1103/PhysRevB.91.014516

©2015 American Physical Society

Authors & Affiliations

V. Vlasko-Vlasov, A. Koshelev, A. Glatz, C. Phillips, U. Welp, and W. Kwok

  • Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA

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Issue

Vol. 91, Iss. 1 — 1 January 2015

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