Vibrating-reed studies of flux penetration in YBa2Cu3O7-

X. D. Shi, P. M. Chaikin, Nai Phuan Ong, Z. Z. Wang

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

Using a vibrating-reed technique, we studied the flux penetration in YBa2Cu3O7- single crystals in the strong pinning regime well below the irreversibility line. The resonant frequency and damping of the vibrating superconductor are dramatically enhanced by the nonuniform and hysteretical penetration of the flux lines at low temperature. Using a critical-state model, we determine the critical current density Jc to be about 3.5×106 A/cm2 at 4.2 K. We also found that Jc obeys an exponential temperature dependence and the flux creep at low temperature can be characterized by a low activation energy barrier on the order of 20 K.

Original languageEnglish (US)
Pages (from-to)13845-13848
Number of pages4
JournalPhysical Review B
Volume50
Issue number18
DOIs
StatePublished - Jan 1 1994

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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