CRYSTAL-STRUCTURE AND TC OF YBA2CU3OY (Y-GREATER-THAN-7)

被引：20

作者：

OKAI, B ^{[1
]}

OHTA, M ^{[1
]}

机构：

[1] NATL INST RES INORGAN MAT, TSUKUBA, IBARAKI 305, JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1991年 / 30卷 / 8A期

关键词：

YBA2CU3OY (Y-GREATER-THAN-7); HIGH-OXYGEN-PRESSURE SYNTHESIS; SUPERCONDUCTOR; CRYSTAL STRUCTURE; CONCENTRATION OF HOLES;

D O I：

10.1143/JJAP.30.L1378

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

At a high oxygen pressure of 6 GPa, YBa2Cu3O(y) was heat-treated. With an increasing supply of oxygen, the crystal structure of the processed specimens gradually changed from orthorhombic (y = 7) to tetragonal (y = 7.7), whereas the onset of superconducting transition temperature consistently remained at 92 K for all of the specimens. The distribution of charges among the copper-oxygen chains and the CuO2 sheets in YBa2Cu3O(y) (y > 7) are discussed.

引用

页码：L1378 / L1380

页数：3

共 4 条

[1] EFFECTS OF OXYGEN STOICHIOMETRY AND OXYGEN ORDERING IN BA2YCU3OY (6-LESS-THAN-OR-EQUAL-TO-Y-LESS-THAN-OR-EQUAL-TO-7)
NAKAZAWA, Y
ISHIKAWA, M
[J]. PHYSICA C, 1989, 158 (03): : 381 - 384
[2] HIGH-OXYGEN-PRESSURE SYNTHESIS OF SUPERCONDUCTING TETRAGONAL YBA2CU3O7.7
OKAI, B
[J]. JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, 1990, 29 (12): : L2193 - L2194
[3] BROADER PERSPECTIVE ON THE HIGH-TEMPERATURE SUPERCONDUCTING YBA2CU3OY SYSTEM - THE REAL ROLE OF THE OXYGEN-CONTENT
TOKURA, Y
TORRANCE, JB
HUANG, TC
NAZZAL, AI
[J]. PHYSICAL REVIEW B, 1988, 38 (10): : 7156 - 7159
[4] METALLIC, BUT NOT SUPERCONDUCTING, LA-BA (AND LA-SR) COPPER OXIDES
TORRANCE, JB
TOKURA, Y
NAZZAL, A
PARKIN, SSP
[J]. PHYSICAL REVIEW LETTERS, 1988, 60 (06) : 542 - 545

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