SPECIFIC-HEAT OF THE CERAMIC SUPERCONDUCTOR BI2SR2CUO6 FROM 0.4-K TO 20-K

被引：16

作者：

COLLOCOTT, SJ

DRIVER, R

ANDRIKIDIS, C

机构：

[1] CSIRO Division of Applied Physics, Lindfield

来源：

PHYSICA C | 1991年 / 173卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(91)90802-6

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Specific heat, C(p), data in the range 0.4 to 20 K for three polycrystalline specimens of Bi2Sr2CuO6 (2:2:0:1 phase, T(c) almost-equal-to 8 K) are reported and compared with similar measurements made on Bi2Sr1.33Ca0.67CuO6 (T(c) almost-equal-to 20 K) which is also of the 2:2:0:1 phase, but with partial substitution of Ca for Sr. No anomaly in C(p) at T(c) is observed in any of the specimens. Below almost-equal-to 2 K, an upturn in C(p)/T is observed in all specimens. The coefficient of the linear term in C(p), gamma-0, is non-zero in all specimens, and is in the range 3 to 10 mJ/(mol K2). A limiting value for the Debye temperature, THETA-D0, of 220 +/- 8 K is obtained.

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页码：117 / 124

页数：8

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