DC Magnetization Relaxation and the AC Susceptibility of YBCO Films with Strong Pinning

L. Miu, Paolo Mele, I. Ivan, A. M. Ionescu, D. Miu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

AC susceptibility and DC magnetization relaxation measurements have been performed for YBa2Cu3O7 films containing BaZrO3 nanorods preferentially oriented along the c axis, with the external magnetic field perpendicular to the film surface. It was found that the effective vortex activation energy Ue supplied by the standard analysis of the frequency dependent AC magnetic response remains very high even in the vicinity of the irreversibility line indicated by the DC relaxation. We show that the large Ue values appearing in the AC signal are related to the pinning enhanced viscous drag and significant vortex velocities.

Original languageEnglish
Pages (from-to)361-365
Number of pages5
JournalJournal of Superconductivity and Novel Magnetism
Volume28
Issue number2
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes

Keywords

  • AC measurements
  • DC magnetization relaxation
  • Flux creep
  • Flux flow
  • YBCO films with BZO nanorods

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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