CHEMICAL CHARACTERIZATION AND SUPERCONDUCTIVITY OF TLBA2CAN-1CUNOY-V SYSTEM

被引：4

作者：

NAKAJIMA, S ^{[1
]}

KIKUCHI, M ^{[1
]}

SYONO, Y ^{[1
]}

KOBAYASHI, N ^{[1
]}

机构：

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

来源：

PHYSICA C | 1991年 / 185卷

关键词：

D O I：

10.1016/0921-4534(91)92139-3

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Oxygen contents of oxygen-annealed TlBa2Can-1CunOy (n = 2-4) specimens were determined by iodometric titration. Relationship between T(c) and oxygen content was investigated by quenching experiments. Oxygen vacancy was estimated to be about 3-4% in the oxygen-annealed TlBa2Can-1 CunOy-y (n = 2-4), and T(c) was found to increase with a small oxygen loss of about v = 0.015, independent of n. The average Cu valence of the oxygen-annealed TlBa2Ca3Cu4Oy phase is calculated to be 2.1+, suggesting too low hole number. The hole of the Tl single layer system was suggested to be only in the CuO2 pyramidal sheet.

引用

页码：673 / 674

页数：2

共 5 条

[1] SUPERCONDUCTIVITY OF HIGH-TC TLBA2CA1-XREXCU2O7 (RE=ND, GD OR Y) SYSTEM
NAKAJIMA, S
KIKUCHI, M
SYONO, Y
KOBAYASHI, N
MUTO, Y
[J]. PHYSICA C, 1990, 168 (1-2): : 57 - 62
[2] SYNTHESIS OF BULK HIGH-TC SUPERCONDUCTORS OF TIBA2CAN-1CUNO2N+3(N=2-5)
NAKAJIMA, S
KIKUCHI, M
SYONO, Y
OKU, T
SHINDO, D
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KOBAYASHI, N
IWASAKI, H
MUTO, Y
[J]. PHYSICA C, 1989, 158 (03): : 471 - 476
[3] IMPROVEMENT IN SUPERCONDUCTIVITY OF TLBA2CACU2OY SYSTEM BY INTRODUCTION OF OXYGEN LOSS
NAKAJIMA, S
KIKUCHI, M
SYONO, Y
NAGASE, K
OKU, T
KOBAYASHI, N
SHINDO, D
HIRAGA, K
[J]. PHYSICA C, 1990, 170 (5-6): : 443 - 447
[4] TL1CAN-1BA2CUNO2N+3 (N=1,2,3) - A NEW CLASS OF CRYSTAL-STRUCTURES EXHIBITING VOLUME SUPERCONDUCTIVITY AT UP TO CONGRUENT-TO 110-K
PARKIN, SSP
LEE, VY
NAZZAL, AI
SAVOY, R
BEYERS, R
LAPLACA, SJ
[J]. PHYSICAL REVIEW LETTERS, 1988, 61 (06) : 750 - 753
[5] CORE LEVEL X-RAY PHOTOELECTRON-SPECTROSCOPY OF TL-BA-CA-CU-O SUPERCONDUCTOR
SUZUKI, T
NAGOSHI, M
FUKUDA, Y
NAKAJIMA, S
KIKUCHI, M
SYONO, Y
TACHIKI, M
[J]. PHYSICA C, 1989, 162 : 1387 - 1388

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