Flux Pinning and Weak Link Structure in Ca-Doped LaBa2Cu3O7-y
Flux Pinning and Weak Link Structure in Ca-Doped LaBa2Cu3O7-y
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Ca 掺杂 LaBa2Cu3O7-y 中的通量钉扎和弱连接结构
DOI：
10.1143/jjap.28.l1226
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
Shōji Tanaka
中科院分区：
文献类型：
--
作者：
Hiromu Masuda;F. Mizuno;I. Hirabayashi;Shōji Tanaka
The effect of Ca doping on the flux pinning and the weak link structure of the LaBa2Cu3O7-y system have been studied. The magnitude and the magnetic field dependence of the critical current density were improved by Ca doping. A small amount of impurity phases of Ca-related compounds such as Ca2Cu1O3 and Ca1Cu2O3 may work as a desirable flux pinning center. Moreover, it was found that the current-temperature characteristics for Ca-doped samples showed the evidence of two kinds of superconductor phases which have different transition temperatures Tc and Tc'. The experimental result agreed well with the Ambegaokar-Baratoff theory for asymmetric Josephson junctions (S-I-S') in the temperature range of T
