ORDERING OF OXYGEN INTO CHAINS AND DISTRIBUTION OF HOLE DENSITY IN YBA2CU3O6+X

被引：31

作者：

PEKKER, S ^{[1
]}

JANOSSY, A ^{[1
]}

ROCKENBAUER, A ^{[1
]}

机构：

[1] CENT RES INST CHEM,H-1525 BUDAPEST,HUNGARY

来源：

PHYSICA C | 1991年 / 181卷 / 1-3期

关键词：

D O I：

10.1016/0921-4534(91)90328-V

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A series of Y0.999Gd0.001Ba2Cu3O6+x compounds is studied by Gd3+ EPR in the full range of oxygen content. The fine structure is modified by the hole distribution in the Cu(2)O2 layers mirroring oxygen chains in the Cu(1)O(x) layers. The fine structure of 5 differently occupied first-neighbour Cu(1)O(x) oxygen chain configurations surrounding the Gd3+ ions is resolved. Formation of chains begins at a threshold oxygen content, x0 = 0.14. For x > 0.14 oxygen in Cu(1)O(x) planes is ordered mainly into chains, the amount of disordered oxygen decreases with increasing x. The EPR intensities are in quantitative agreement with a model calculation of 2-dimensionally ordered oxygen chains.

引用

页码：11 / 17

页数：7

共 25 条

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