Pressure Effects on Tc of Superconductor YBa2Cu4O8
- 1 February 1990
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 29 (2A), L250
- https://doi.org/10.1143/jjap.29.l250
Abstract
The enhancement of the superconducting transition temperature by pressure was studied up to 2 GPa for an YBa2Cu4O8 compound which was synthesized by using the canned HIP technique. The value of dT c/dP was found to be 5.5 K/GPa. From the experiments of the specimen in which YBa2Cu4O8 and Y2Ba4Cu7O14 compounds coexist, dT c/dP for Y2Ba4Cu7O14 was also shown to be 5.5 K/GPa. The result for the YBa2Cu4O8 compound is explained by the pressure induced carrier (hole) redistribution on the basis of the calculation of the Madelung energy.Keywords
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