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

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

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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
Issue number8
Publication statusPublished - 1993

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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