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500–600 K Dilatation Anomaly and Tc Increase in YBa2Cu3Ox

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Abstract

YBa2Cu3O x bulk ceramics have been simultaneously investigated by the thermal expansion and the acoustic emission methods in the 500–600 K temperature range. An error of the differential dilatometer does not exceed 10−7. At T = 555 K, the dilatation anomaly accompanied by the acoustic emission has been observed and measured. Based on this measured anomaly, a value of Δc = −0.003 μm has been determined. And based on this Δc size the stoichiometric coefficient x = 7.01 has been calculated too. The possible mechanism for T c increase in YBa2Cu3O x as a result of closing b axis by the absorbed oxygen atoms during the samples' heating through 500–600 K has been discussed.

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  1. School of Applied Science, Hebrew University, Givat Ram Campus, Bergman Bld., Jerusalem, 91904, Israel

    E. A. Dul'kin

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  1. E. A. Dul'kin
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Dul'kin, E.A. 500–600 K Dilatation Anomaly and Tc Increase in YBa2Cu3Ox . Journal of Superconductivity 14, 497–499 (2001). https://doi.org/10.1023/A:1012287613422

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  • DOI: https://doi.org/10.1023/A:1012287613422

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