A study of the heat conduction of superconductors: measurement and mechanism of the thermal conductivities of high-critical temperature oxide superconductors.

Type of article: Article

Summary

The thermal conductivities and the electrical resistivities of YBCO, ErBCO and BSCCO compounds using the steady-state comparative method and the conventional four-probe method are measured. The phonon thermal conductivities were found to predominate below the transition temperature and had strikingly large values. The normalization of the measured thermal conductivities with respect to the critical thermal conductivity shows that the temperature dependence of the three compounds is very similar. A new two-fluid model of phonons for the heat current in the superconducting temperature region is presented. This model explains most of the normalized thermal conductivities. K.R.

Details

Original title: A study of the heat conduction of superconductors: measurement and mechanism of the thermal conductivities of high-critical temperature oxide superconductors.
Record ID : 1993-1235
Languages: English
Source: JSME int. J., Ser. II - vol. 34 - n. 3
Publication date: 1991/08
Document available for consultation in the library of the IIR headquarters only.

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Indexing

Themes: Superconduction
Keywords: Thermal conductivity; Superconduction; Oxide; Copper; Ceramics; BSCCO; Barium; YBCO; Electrical resistance; Superconductor; High temperature; Erbium