Ultrasonic Studies of the High-Tc Superconductor YBa2Cu3Oy

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Copyright (c) 1988 The Japan Society of Applied Physics
, , Citation Masaru Suzuki et al 1988 Jpn. J. Appl. Phys. 27 50 DOI 10.7567/JJAPS.27S1.50

1347-4065/27/S1/50

Abstract

We have measured the sound velocity and attenuation of the ortho-I single-phase YBa2Cu3Oy, which has a superconducting transition temperature of about 90 K, and compared them with the tetral-II single-phase YBa2Cu3Oy, which is a semiconductor. The sound velocity of the ortho-I has an additional increase below Tc, which is not observed in the tetra-II. This anomaly may be related directly to the superconductivity of this material. This is not explained by thermodynamic analysis.

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10.7567/JJAPS.27S1.50