CORRELATION BETWEEN SITE PREFERENCE, SUPERCONDUCTIVITY AND MAGNETISM IN PB2SR2Y1-XCAX(CU1-YMY)3O8 (M = FE, CO, NI, ZN, GA)

被引：9

作者：

KOIKE, Y

KAIWA, M

KAJITANI, T

KATO, M

SUNAGAWA, H

NOJI, T

KOBAYASHI, N

MORII, Y

FUNAHASHI, S

SAITO, Y

机构：

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

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

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1993年 / 211卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(93)90148-J

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Site preference of the partially substituted 3d metal M and superconducting and magnetic properties have been investigated for Pb2Sr2Y1-xCax(Cu1-yMy)3O8 (M=Fe, Co, Ni, Zn, Ga). It has been found from powder neutron diffraction that Fe atoms preferentially occupy the Cu (1) site in the oxygen-free Cu layer, while Co, Ni, Zn and Ga atoms occupy the Cu (2) site in the CuO2 layer. From correlation between this site preference of M and the superconducting and magnetic properties, it has been concluded that the partial Cu(1)-site substitution shows little effect on the superconductivity and that there remains antiferromagnetic correlation between Cu2+ spins in the Cu(2) site in the normal state even for the high-T(c) samples of x=0.5 with T(c) almost-equal-to 80 K.

引用

页码：409 / 420

页数：12

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