A NEW HOMOLOGOUS SERIES OF OXYCARBONATE SUPERCONDUCTORS SR2(CA,SR)N-1CUN(CO3)1-X(BO3)XOY (N=1, 2 AND 3)

被引：34

作者：

UEHARA, M

UOSHIMA, M

ISHIYAMA, S

NAKATA, H

AKIMITSU, J

MATSUI, Y

ARIMA, T

TOKURA, Y

MORI, N

机构：

[1] AOYAMA GAKUIN UNIV,DEPT PHYS,TOKYO 157,JAPAN

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

[3] UNIV TOKYO,DEPT PHYS,BUNKYO KU,TOKYO 113,JAPAN

[4] UNIV TOKYO,INST SOLID STATE PHYS,MINATO KU,TOKYO 106,JAPAN

来源：

PHYSICA C | 1994年 / 229卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(94)90511-8

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A new homologous series of oxycarbonate superconductors Sr2(Ca,Sr)n-1Cu(n)(CO3)1-x(BO3)xO(y) (n = 1, 2 and 3) prepared under high pressure have been found by resistivity and magnetization measurements. X-ray powder diffraction and HRTEM studies show that these phases have tetragonal structures with a = 3.86 angstrom and c = 7.40 angstrom for n = 1, a = 3.86 angstrom and c = 10.62 angstrom for n = 2, and a = 3.87 angstrom and c = 13.98 angstrom for n = 3. Resistivity and magnetization measurements revealed that superconducting transition temperatures were 50, 105 and 115 K for n = 1-3, respectively. These T(c)'s are higher than those of the structurally related analogous TIBa2Ca(n-1)Cu(n)O2n + 3 at 110 K (n = 2 and 3).

引用

页码：310 / 314

页数：5

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