Forward and reverse flux creep in single crystal Tl2Ca2BaCu2Oχ superconductors

Fulin Zuo, M. B. Salamon, T. Datta, K. Ghiron, H. Duan, A. M. Hermann

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We report the observation of novel flux motion in single-crystal superconducting Tl2Ca2BaCu2Oχ. Application of a field H≤1 kG following zero-field cooling results in typical logarithmic flux creep, with a peak in δM/δln t near 18 K. Above 50 K, different flux dynamics are observed: an exponential decrease in the diamagnetic moment that gives way near 70 K to the appearance of reverse creep, i.e., increasingly negative magnetization. This latter effect begins after a temperature- and field-dependent wait time. While conventional theory explains inward flux creep, we must invoke flux-line roughening, drive by pinning randomness, to give rise to reverse creep.

Original languageEnglish (US)
Pages (from-to)541-546
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume176
Issue number4-6
DOIs
StatePublished - Jun 1 1991
Externally publishedYes

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Superconducting materials
Creep
Single crystals
Fluxes
single crystals
Magnetization
Cooling
moments
cooling
magnetization
Temperature
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Forward and reverse flux creep in single crystal Tl2Ca2BaCu2Oχ superconductors. / Zuo, Fulin; Salamon, M. B.; Datta, T.; Ghiron, K.; Duan, H.; Hermann, A. M.

In: Physica C: Superconductivity and its Applications, Vol. 176, No. 4-6, 01.06.1991, p. 541-546.

Research output: Contribution to journalArticle

Zuo, Fulin ; Salamon, M. B. ; Datta, T. ; Ghiron, K. ; Duan, H. ; Hermann, A. M. / Forward and reverse flux creep in single crystal Tl2Ca2BaCu2Oχ superconductors. In: Physica C: Superconductivity and its Applications. 1991 ; Vol. 176, No. 4-6. pp. 541-546.
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