AC SUSCEPTIBILITY, RESISTIVITY AND SPECIFIC-HEAT OF THE CUBIC SUPERCONDUCTOR BA0.6K0.4BIO3

被引：8

作者：

SAVVIDES, N ^{[1
]}

COLLOCOTT, SJ ^{[1
]}

ANDRIKIDIS, C ^{[1
]}

MULLER, KH ^{[1
]}

VANCE, ER ^{[1
]}

机构：

[1] ANSTO, SYDNEY, NSW 2234, AUSTRALIA

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1990年 / 171卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(90)90472-Q

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

AC susceptibility, magnetotransport and specific heat measurements on single phase bulk polycrystalline Ba0.6K0.4BiO3, with Tc{reversed tilde equals}31 K, are reported. The complex AC susceptibility, χ = χ′ + iχ″, measured in AC fields of 0.001-50 G rms, shows both intragrain and intergrain components characteristics of a granular superconductor, where the positions of the χ″ intra- and intergranular peaks are strongly field dependent. A value of 18 T is obtained for the upper critical field, Hc2(0), from measurements of the superconducting resistive transition as a function of DC magnetic field. The coherence length, ξ(0), is determined to be 43 Å. Specific heat, Cp, measurements from 0.5 to 20 K show no evidence of a term that has a linear temperature dependence or an upturn in Cp/T. © 1990.

引用

页码：181 / 186

页数：6

共 20 条

[1] SUPERCONDUCTIVITY NEAR 30-K WITHOUT COPPER - THE BA0.6K0.4BIO3 PEROVSKITE [J].