NEW SERIES OF HIGH T(C) SUPERCONDUCTORS, GASR2CAN-1CUNO2N+3 (N=3 T(C)=70-K, N=4 T(C)=107-K) PREPARED AT HIGH-PRESSURE

被引：22

作者：

TAKAYAMAMUROMACHI, E ^{[1
]}

ISOBE, M ^{[1
]}

机构：

[1] SONY CORP, RES CTR, HODOGAYA KU, YOKOHAMA, KANAGAWA 240, JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1994年 / 33卷 / 10A期

关键词：

OXIDE SUPERCONDUCTOR; GASR2CAN-1CUNO2N+3; (N=3; 4); HIGH-PRESSURE SYNTHESIS; MAGNETIC SUSCEPTIBILITY; ELECTRIC RESISTIVITY;

D O I：

10.1143/JJAP.33.L1399

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A new series of superconductors, GaSr2Ca(n)-1Cu(n)O2n+3 (n = 3, 4), were prepared under a high pressure of 6 GPa at 1250-degrees-C. The n = 4 member becomes superconducting below 107 K while the n = 3 one below 70 K. From an analogy with the structure of the Ga-1212 phase, their X-ray patterns were indexed assuming orthorhombic lattices with the space group of I2mb (Ima2, No. 46): a = 5.454(1), b = 5.391(1) and c = 29.371(6) angstrom for the n = 3 member and a = 5.462(4), b = 5.417(4) and c = 35.78(5) angstrom for the n = 4 one. They have structures closely related to those of Tl (or Hg)-1223 and 1234 phases.

引用

页码：L1399 / L1402

页数：4

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