HIGH OXYGEN-PRESSURE SYNTHESIS OF NEW COPPER-OXIDE SUPERCONDUCTORS

被引：1

作者：

DABROWSKI, B ^{[1
]}

ZHANGMACCOY, V ^{[1
]}

WANG, Z ^{[1
]}

HANNON, R ^{[1
]}

JORGENSEN, JD ^{[1
]}

HUNTER, BA ^{[1
]}

HINKS, DG ^{[1
]}

WAGNER, JL ^{[1
]}

HITTERMAN, RL ^{[1
]}

机构：

[1] ARGONNE NATL LAB,DIV MAT SCI,ARGONNE,IL 60439

来源：

JOURNAL OF SUPERCONDUCTIVITY | 1994年 / 7卷 / 01期

关键词：

LA2CUO4; HIGH PRESSURE; LA-CA-CU-O; Y-SR-LA-CU-O; OXYGEN PRESSURE;

D O I：

10.1007/BF00730366

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The unique coordination of the copper ions in +1, +2, and +3 oxidation states, which are stable in a range of oxygen partial pressure, 10(-6) < P(O2) < 10(3) atm, makes possible the formation of a wide variety of distinct structures. By controlling the oxygen pressure during the synthesis and annealing, the distribution of metal and oxygen ions can be modified on an atomic scale to optimize the structural and electronic properties. We present several examples of compounds for which the critical structural elements for superconductivity, i.e., the perfectly ordered CuO2 planes, have been obtained and doped with holes by means of high oxygen pressure, P(O2) > 1 atm. These materials, La2CuO4+delta, La2-xCaxCuO4, and YSr2-xLaxCu3O7+delta, offer a unique opportunity to study the relationship between superconductivity and structural, magnetic, and chemical properties.

引用

页码：45 / 48

页数：4

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