DOI: https://doi.org/10.30970/jps.02.384
AC-MAGNETIC SUSCEPTIBILITY OF GRANULAR HG-CONTAINING HIGH-TEMPERATURE SUPERCONDUCTORS
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Journal of Physical Studies 2(3), 384–390 (1998)
DOI: https://doi.org/10.30970/jps.02.384 AC-MAGNETIC SUSCEPTIBILITY OF GRANULAR HG-CONTAINING HIGH-TEMPERATURE SUPERCONDUCTORS |
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R. V. Lutciv, I. I. Gabriel', I. V. Lazaryuk, M. V. Matviyiv
The Ivan Franko State University of Lviv, Chair of Radioelectronic Materials Sciences,
50 Drahomanov Str., Lviv, UA–290005, Ukraine
Experimental dependencies of ac–magnetic susceptibility $χ=χ'-{\rm i}χ”$ versus temperature and constant magnetic field for the Hg–containing high–temperature ceramic superconductors are established. A description of the automatic device for the signals spectrum from the HTSC–samples measuring and their analysis is provided. Experimental results for the (Hg, Pb)–1212 and (Hg, Pb)–1223 have been presented in the framework of the modified critical state model. Critical parameters for the Josephson's medium and superconductive granules were received from the comparison of experimental and calculated dependencies. As shown, junctions between superconductive granules are realized as SNS contacts.