The magnetic and transport properties of high-critical-current Tl 2Ba2Ca2Cu3Ox superconducting thin films

M. L. Chu*, H. L. Chang, C. Wang, Jenh-Yih Juang, T. M. Uen, Y. S. Gou

*Corresponding author for this work

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Highly c-axis-oriented Tl2Ba2Ca2Cu 3Ox superconducting thin films with the critical current density as high as 1×107 A/cm2 at 87 K were obtained by single-target dc sputtering on LaAlO3(100) substrates followed by encapsulated compensate annealing. The strong linear temperature dependence of zero-field critical current at low temperatures suggests a creep-dominated behavior. Preliminary field dependence studies on the critical current density in low-field regime (<2 kOe) shows no evidence of hysteresis commonly encountered in films with higher granularity. The scaling behavior of the global pinning force density exhibits strong resemblance to conventional type-II superconductors with the pinning force density of the same order of magnitude as that in strong pinned NbN thin films.

Original languageEnglish
Pages (from-to)1123-1125
Number of pages3
JournalApplied Physics Letters
Issue number9
StatePublished - 26 Aug 1991


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