Dependence of superconducting properties on the Cu-valence determined by iodometry in HgBa2CuO4+delta

被引：57

作者：

Fukuoka, A ^{[1
]}

TokiwaYamamoto, A ^{[1
]}

Itoh, M ^{[1
]}

Usami, R ^{[1
]}

Adachi, S ^{[1
]}

Yamauchi, H ^{[1
]}

Tanabe, K ^{[1
]}

机构：

[1] INT SUPERCONDUCT TECHNOL CTR,SUPERCONDUCT RES LAB,KOTO KU,TOKYO 135,JAPAN

来源：

PHYSICA C | 1996年 / 265卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(96)00288-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have synthesized nearly single-phase HgBa2CuO4+delta samples with various oxygen contents, and systematically investigated the relationship between the lattice parameters, the superconductivity transition temperature (T-c) and the oxygen content determined by iodometry. Furthermore, the nominal copper valence values were calculated from the oxygen content data by assuming constant valence values of +2.00 and -2.00 for mercury and oxygen, respectively. Both the a and c lattice parameters were found to decrease monotonically with the Cu valence over a wide range of +2.05-2.28. The obtained T-c versus Cu valence curve exhibits a ''bell shaped'' correlation with the maximum in T-c at the Cu valence of similar to +2.18.

引用

页码：13 / 18

页数：6

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