EFFECT OF CO SUBSTITUTION ON THE THERMAL-EXPANSION OF THE HIGH-T-C SUPERCONDUCTOR Y1BA2CU3OY

被引：5
作者：
RAO, A [1 ]
PRAKASH, O [1 ]
DAS, SN [1 ]
DHEER, PN [1 ]
机构：
[1] UNIV DELHI,DEPT PHYS & ASTROPHYS,DELHI 110007,INDIA
来源：
SOLID STATE COMMUNICATIONS | 1995年 / 94卷 / 12期
关键词：
HIGH-T-C SUPERCONDUCTORS; THERMAL EXPANSION; PHASE TRANSITIONS;
D O I：
10.1016/0038-1098(95)80071-9
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Measurement of the coefficient of linear thermal expansion, alpha, has been carried out for the high-T-c superconducting compounds Y1Ba2(Cu1-xCox)(3)O-y using a high resolution capacitance dilatometer in the temperature range 77-300 K. The studies reveal that the superconducting and normal state values of alpha, increase almost linearly with increase in Co content. All the superconducting samples exhibit the expected second order phase transition (from normal to superconducting state) characterized by discontinuity in alpha, at their respective transition temperatures, T-c. The jump Delta alpha, is also found to increase almost linearly with the increase in Co concentration. There is evidence that the temperature dependence of alpha for compounds having large Co concentration (greater than or equal to 3%) depends on the conditions of specimen growth.
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收藏
页码：991 / 995
页数：5
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