IODOMETRIC DETERMINATION OF OXYGEN CONTENTS OF THE TL SINGLE LAYER SYSTEM AND THEIR RELEVANCE TO SUPERCONDUCTIVITY

被引：27

作者：

NAKAJIMA, S

KIKUCHI, M

SYONO, Y

OKU, T

NAGASE, K

KOBAYASHI, N

SHINDO, D

HIRAGA, K

机构：

[1] TOHOKU UNIV,INST MAT RES,AOBA KU,SENDAI,MIYAGI 980,JAPAN

[2] TOHOKU UNIV,COLL EDUC,AOBA KU,SENDAI,MIYAGI 980,JAPAN

来源：

PHYSICA C | 1991年 / 182卷 / 1-3期

关键词：

D O I：

10.1016/0921-4534(91)90461-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The oxygen contents of oxygen-annealed Tl single layer systems were determined by iodometric titration. The oxygen contents, w, of TlBa2Ca1-xYxCu2Ow increased with Y concentration, x, substituted for Ca. Oxygen vacancy, y, was estimated to be about y = 0.3 in oxygen-annealed TlBa2Can-1CunO2n+3-y (n = 2, 3, 4). The Cu valence of oxygen-annealed TlBa2Can-1CunO2n+3-y is calculated to be about 2.2+, if the hole is introduced only in the CuO2 pyramidal sheets. Square planar CuO2 planes of the Tl single layer system may not be active for superconductivity.

引用

页码：89 / 94

页数：6

共 11 条

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