Anomalous elastic behaviour of Bi-Pb-Ag composites

R. Ravinder Reddy, M. Muralidhar, V. Hari Babu, P. Venugopal Reddy

研究成果: Article査読

5 被引用数 (Scopus)

抄録

Bi-Pb and Bi-Pb-Ag superconducting composites have been prepared by the solid state reaction method. After the usual characterization, ultrasonic longitudinal velocity and attenuation studies have been undertaken over a temperature range 80-300 K by the pulse transmission technique. In contrast to normal solids, the ultrasonic velocities of both the samples in the temperature range 200-100 K are found to decrease with decreasing temperature (softening), followed by a velocity maximum. The samples are also found to exhibit longitudinal attenuation peaks at temperatures = 260, 160 and 120 K. An attempt has also been made to verify whether the Wachtman's equations can theoretically explain the low-temperature behaviour of the Young's modulus of these materials. A qualitative explanation for both the phenomena of softening of velocity as well as the occurrence of attenuation peaks is given.

本文言語English
ページ(範囲)367-372
ページ数6
ジャーナルPhysica C: Superconductivity and its applications
220
3-4
DOI
出版ステータスPublished - 1994 2 10
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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