ORDERING OF CHAIN OXYGEN IN YBA2CU3OX - OPTICAL INVESTIGATIONS ON SINGLE-DOMAIN CRYSTALS

被引：33

作者：

WIDDER, K ^{[1
]}

ZIBOLD, A ^{[1
]}

MERZ, M ^{[1
]}

GESERICH, HP ^{[1
]}

ERB, A ^{[1
]}

MULLERVOGT, G ^{[1
]}

机构：

[1] UNIV KARLSRUHE,KRISTALL & MAT LAB,D-76128 KARLSRUHE,GERMANY

来源：

PHYSICA C | 1994年 / 232卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90296-8

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have determined the polarized reflectance spectra of (001) surfaces of YBa2Cu3O(x) single-domain crystals with intermediate oxygen content. Using the in-plane anisotropy of the optical properties, we could separate the contribution of the Cu-O layers and the Cu-O chains to the electronic transport properties. Taking the spectra in situ while the samples were heated up from room temperature to 150-degrees-C, thermodynamical equilibrium states were established. We observe a strong decrease of the free carrier and the Cu1+ concentration and the chain length with increasing temperature. Comparing the total number of free carriers with the number of Cu1+ ions, we find a direct correlation in accordance with a simple chemical model.

引用

页码：82 / 88

页数：7

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