Weak links and critical current density in Bi2Sr 2CaCu2Ox thin films

H. A. Lu, J. Chen, B. W. Wessels, D. L. Schulz, Tobin J Marks

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Abstract

Magnetization measurements were performed on epitaxial and textured Bi 2Sr2CaCu2Ox thin films deposited on (100) LaAlO3 and MgO substrates. An anomalous dependence of the critical current density derived from magnetization hysteresis measurement on magnetic field is observed. The measured critical current density shows a minimum at a magnetic field (Hm) far below the upper critical field Hc2. The measured Hm in epitaxial films has an exponential dependence on temperature, e-T/T0 (T0∼12.5 K). The anomalous field dependence of critical current density is attributed to the presence of weak links in the films.

Original languageEnglish
Pages (from-to)3886-3889
Number of pages4
JournalJournal of Applied Physics
Volume73
Issue number8
DOIs
Publication statusPublished - 1993

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critical current
current density
thin films
magnetization
magnetic fields
hysteresis
temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Weak links and critical current density in Bi2Sr 2CaCu2Ox thin films. / Lu, H. A.; Chen, J.; Wessels, B. W.; Schulz, D. L.; Marks, Tobin J.

In: Journal of Applied Physics, Vol. 73, No. 8, 1993, p. 3886-3889.

Research output: Contribution to journalArticle

Lu, H. A. ; Chen, J. ; Wessels, B. W. ; Schulz, D. L. ; Marks, Tobin J. / Weak links and critical current density in Bi2Sr 2CaCu2Ox thin films. In: Journal of Applied Physics. 1993 ; Vol. 73, No. 8. pp. 3886-3889.
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