Electrochemical oxidation of La2CuO4 single crystals

被引：0

作者：

Chen, L ^{[1
]}

Huang, YZ ^{[1
]}

Zhou, F ^{[1
]}

Dong, C ^{[1
]}

Che, GC ^{[1
]}

Zhao, ZX ^{[1
]}

机构：

[1] Chinese Acad Sci, Natl Lab Supercond, Beijing 100080, Peoples R China

来源：

CHINESE PHYSICS | 2000年 / 9卷 / 08期

关键词：

electrochemical oxidation; La2CuO4; crystals;

D O I：

暂无

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Bulk superconducting La2CuO4+delta single crystals are obtained by using electrochemical intercalation technique from the as-grown insulating samples. Oxidation is carried out by constant current I=10 mu A at temperature T = 70 degrees C and room temperature, respectively. Structure and magnetic properties are studied by low-temperature X-ray diffraction and susceptibility measurements. A superconducting phase with T-c of 19K and delta-0.12 can be attributed to the formation of oxygen clusters. Room temperature oxidation is inhomogeneous: two superconducting phases with T-c1 of 24K and T-c2 of 8K and an antiferromagnetic phase are coexisting in the crystal. It is found that the appearance of T-c in this system has the "step" tendency.

引用

页码：624 / 629

页数：6

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