MOTIONAL BROADENING OF FE-57 MOSSBAUER-EFFECT RESONANCE IN CUPRATE SUPERCONDUCTORS

被引：43
|
作者：
WU, Y
PRADHAN, S
BOOLCHAND, P
机构：
[1] Department of Electrical and Computer Engineering, University of Cincinnati, Cincinnati
来源：
PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 22期
关键词：
D O I：
10.1103/PhysRevLett.67.3184
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The temperature dependence of the Fe-57 resonance in YBa2(Cu0.98Fe0.02)4O8 samples shows evidence of a discontinuity in the observed linewidth GAMMA(T), isomer shift, and quadrupole splitting at T(c). GAMMA(T) is found to increase precipitously at T < T(c) with the excess width DELTA-GAMMA(T) thermally activated. This behavior is a signature of a fluctuating electric-field gradient in the planes with the fluctuations slowing down in the superconducting phase,
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页码：3184 / 3187
页数：4
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