Observation of a diamagnetic signal up to 132 K in a Tl-Ca-Ba-Cu-O compound

T. Kàmàn, E. Lähderanta, S. Leppävuori, I. Halàsz, I. Dòdony, G. Zsolt, T. Porjesz, R. Laiho, A. Uusimäki, I. Kirschner, Gy Kovács

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Tl-Ca-Ba-Cu-O compounds of the nominal composition of (1, 1, 1, 1) have been prepared from different starting materials and with the same heat treatment process. During the investigation of their properties a diamagnetic signal has been found up to the temperature of 132 K. This hints at the existence of a certain material content distributed into discrete superconducting domains. The parameters of it reflect a superstructure of the (2, 2, 2, 3) and (2, 1, 2, 2) compositions having a time-dependent behaviour. On the basis of the signal levels at 132 K and 4.2 K, the quantity of the high temperature superconducting material is about 0.01% of the total one at liquid He temperatures.

Original languageEnglish
Pages (from-to)169-173
Number of pages5
JournalZeitschrift für Physik B Condensed Matter
Issue number2
Publication statusPublished - Jun 1 1990


ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Kàmàn, T., Lähderanta, E., Leppävuori, S., Halàsz, I., Dòdony, I., Zsolt, G., Porjesz, T., Laiho, R., Uusimäki, A., Kirschner, I., & Kovács, G. (1990). Observation of a diamagnetic signal up to 132 K in a Tl-Ca-Ba-Cu-O compound. Zeitschrift für Physik B Condensed Matter, 78(2), 169-173. https://doi.org/10.1007/BF01307832