Affiliation:
1. Department of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, T6G 2G7, Canada
Abstract
Single phase polycrystalline high-T c superconductor Y 1 Ba 2 Cu 4 O 8 (Y124) has been measured by employing longitudinal and transverse ultrasonic waves, low-temperature X-ray diffraction, and specific heat. Comparison of the obtained data with the data of nuclear quadrupole resonance, nuclear magnetic resonance, and magnetic susceptibility measurements available in the literature from other groups implies the opening of a pseudospin gap near 260 K in Y124. It is proposed that the ultrasonic anomalies observed in Y124 near 260 K originate from the interactions between ultrasonic waves and long wavelength spin excitations.
Publisher
World Scientific Pub Co Pte Lt
Subject
Condensed Matter Physics,Statistical and Nonlinear Physics
Cited by
6 articles.
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