NEW HIGH-T(C) SUPERCONDUCTOR AG1-XCUXBA2CAN-1CUNO2N+3-DELTA FAMILY WITH T(C)GREATER-THAN-117-K

被引：52

作者：

IHARA, H

TOKIWA, K

OZAWA, H

HIRABAYASHI, M

MATUHATA, H

NEGISHI, A

SONG, YS

机构：

[1] SCI UNIV TOKYO, FAC SCI, DEPT APPL PHYS, SHINJUKU KU, TOKYO 162, JAPAN

[2] NIHON UNIV, COLL SCI & TECHNOL, DEPT ELECTR ENGN, FUNABASHI, CHIBA 274, JAPAN

[3] SEOUL NATL UNIV, DEPT PHYS, SEOUL 151742, SOUTH KOREA

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1994年 / 33卷 / 3A期

关键词：

AG-BA-CA-CU-O; AGBA2CA3CU4O10; AG1-XCUXBA2CAN-1CUNO2N+2; SILVER-BASED CUPRATE SUPERCONDUCTOR; HIGH-PRESSURE SYNTHESIS; SUPERCONDUCTOR; HIGH-TEMPERATURE SUPERCONDUCTOR;

D O I：

10.1143/JJAP.33.L300

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A new high-temperature and nontoxic superconductor Ag1-xCuxBa2Can-1CunO2n+3-delta family with T(c) > 117 K was discovered. These materials are prepared by the high-pressure technique. A superconductor sample with the highest T(c) contains mainly a Ag1-xCuxBa2Ca3Cu4O11-delta (x = 0.75) phase. The phase has a body-centered tetragonal structure with lattice constants of a = 7.7270 angstrom and c = 36.222 angstrom. The disordering of Ag sites leads to the space group of P4/mmm and the lattice constants of a = 3.8635 angstrom and c = 18.111 angstrom. The T(c) value of the Ag1-xCuxBa2Ca3Cu4O11-delta phase is 117.1 K. The relationship between the lattice constant c and the number of CuO2 layers n is c/2 = 5.3 + 3.2n (angstrom). The small CuO2-block spacing (8.5 angstrom) of this family suggests a lower anisotropy and higher J(c) than Hg- and Tl-based superconductor families.

引用

页码：L300 / L303

页数：4

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