Evidence of surface barriers in single-crystal Tl2Ba2CuO6 superconductors

Fulin Zuo, D. Vacaru, H. M. Duan, A. M. Hermann

Research output: Contribution to journalArticle

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Abstract

We report direct evidence of surface barriers in single crystals of Tl2Ba2CuO6 superconductors. Magnetization is measured as a function of temperature with magnetic field applied parallel to the c axis. For small field, a characteristic linear increase in M is observed at an onset temperature T1. For higher magnetic field, a new feature at low T is observed in the M(T) data. The flux penetration temperature is retarded to a higher temperature. The penetration field Hp at temperature below 50 K determined by the first linear rise in M(T) can be fitted with the relation Hp(T)=Hcexp(-T/T0), consistent with a model where two-dimensional pancakes penetrate the Bean-Livingston barrier by thermal activation. The low critical field Hc1 determined from the bulk penetration of vortices is also presented.

Original languageEnglish (US)
Pages (from-to)5535-5538
Number of pages4
JournalPhysical Review B
Volume47
Issue number9
DOIs
StatePublished - Jan 1 1993

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penetration
single crystals
temperature
two dimensional models
magnetic fields
activation
vortices
magnetization

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Evidence of surface barriers in single-crystal Tl2Ba2CuO6 superconductors. / Zuo, Fulin; Vacaru, D.; Duan, H. M.; Hermann, A. M.

In: Physical Review B, Vol. 47, No. 9, 01.01.1993, p. 5535-5538.

Research output: Contribution to journalArticle

Zuo, Fulin ; Vacaru, D. ; Duan, H. M. ; Hermann, A. M. / Evidence of surface barriers in single-crystal Tl2Ba2CuO6 superconductors. In: Physical Review B. 1993 ; Vol. 47, No. 9. pp. 5535-5538.
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