Ultrasonic attenuation measurements in sinter-forged YBa2Cu3O7-

M. F. Xu*, D. Bein, R. F. Wiegert, Bimal K. Sarma, M. Levy, Z. Zhao, S. Adenwalla, A. Moreau, Q. Robinson, D. L. Johnson, S. J. Hwu, K. R. Poeppelmeier, J. B. Ketterson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


We report ultrasonic attenuation measurements on sinter-forged YBa2Cu3O7- material, which differs from ordinary sintered material in that the crystallites are preferentially oriented to form a uniaxial sample. Three peaks in attenuation, at temperatures of 250, 180, and 70 K, were observed for longitudinal waves propagating perpendicular to the forging axis, which is similar to that reported in ordinary (isotropic) polycrystalline samples. However, for both transverse and longitudinal sound propagated along the forging axis we have a different behavior, with only one peak at 180 K, showing a strong anisotropy. It is suggested that sound waves traveling parallel to and normal to the Cu-O planes may account for the anisotropic effect, and a relaxation mechanism may explain the increase in shear wave attenuation which was seen with decreasing temperature.

Original languageEnglish (US)
Pages (from-to)843-846
Number of pages4
JournalPhysical Review B
Issue number1
StatePublished - 1989

ASJC Scopus subject areas

  • Condensed Matter Physics


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