ELASTIC PROPERTIES OF SINGLE-CRYSTAL BI2.2SR1.8CACU2OY AS MEASURED BY A VIBRATING REED METHOD

被引：12

作者：

NES, OM

FOSSHEIM, K

MOTOHIRA, N

KITAZAWA, K

机构：

[1] NORWEGIAN INST TECHNOL,DIV PHYS,N-7034 TRONDHEIM,NORWAY

[2] UNIV TOKYO,DEPT IND CHEM,BUNKYO KU,TOKYO 113,JAPAN

来源：

PHYSICA C | 1991年 / 185卷 / pt 2期

关键词：

D O I：

10.1016/0921-4534(91)91919-U

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have measured a discontinuity DELTA-dlnv(e)/dT congruent-to 7 ppm/K in Young's modulus sound velocity at T(c) = 83.8 K for single crystal Bi2.2Sr1.8CaCu2Oy. The anomaly is associated with the superconducting transition. We are not able to resolve any softening in DELTA-v(e)/v(e) at T(c) within our experimental resolution of better than 1ppm. This might indicate anisotropic stress dependence of T(c) as well as possible large quadratic coupling of stress to T(c). The position of an observed peak in the internal friction Q-1 at 145 K seems not to be directly related to superconductivity.

引用

页码：1391 / 1392

页数：2