Journal of Materials Science

, Volume 27, Issue 10, pp 2623–2626 | Cite as

Elastic anomaly of YBa2Cu3O7−x superconductors containing different oxygen contents

  • P. G. Galliano
  • N. Soga
  • K. Hirao


Four samples of YBa2Cu3O7−x with different values of x were prepared and characterized, and their elastic properties from 80 K to room temperature were investigated. It was found that an anomalous softening of the elastic moduli G, K, and E temperatures slightly higher than Tc appeared only on the specimens with the superconducting orthorhombic phase. As the value of x became small and the transition width ΔTc became narrower, the softening became remarkable. The elastic constants also showed a thermal hysteresis at low temperatures. Relationships between this behaviour and proposed structural and domain changes are discussed.


Oxygen Polymer Elastic Modulus Oxygen Content Elastic Property 
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Copyright information

© Chapman & Hall 1992

Authors and Affiliations

  • P. G. Galliano
    • 1
  • N. Soga
    • 1
  • K. Hirao
    • 1
  1. 1.Faculty of EngineeringKyoto UniversityKyotoJapan

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