EFFECTS OF ZN SUBSTITUTION FOR CU ON SUPERCONDUCTING AND NORMAL-STATE PROPERTIES OF (LA,SR)2CUO4, (ND,CE,SR)2CUO4, AND (ND,CE)2CUO4

被引：35

作者：

IKEGAWA, S ^{[1
]}

YAMASHITA, T ^{[1
]}

SAKURAI, T ^{[1
]}

ITTI, R ^{[1
]}

YAMAUCHI, H ^{[1
]}

TANAKA, S ^{[1
]}

机构：

[1] INT SUPERCOND TECHNOL CTR, SUPERCOND RES LAB, KOTO KU, TOKYO 135, JAPAN

来源：

PHYSICAL REVIEW B | 1991年 / 43卷 / 04期

关键词：

D O I：

10.1103/PhysRevB.43.2885

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Superconducting and normal-state properties of Zn-doped samples of La1.85Sr0.15Cu(1-x)Zn(x)O4-delta (T phase), Nd1.4Ce0.2Sr0.4Cu(1-x)Zn(x)O4-delta (T* phase), and Nd1.85Ce0.15Cu(1-x)Zn(x)O4-delta (T' phase) are investigated for Zn content x in the range of 0-0.04. Zn doping alters the lattice parameters for the T and T* phases but does not for the T' phase. For all of the T, T*, and T' phases, T(c), the Meissner signal, and the shielding signal monotonically decrease for increasing x. From the magnetic-susceptibility measurement, it is suspected that isolated Cu spins are induced around doped Zn in the T phase. As the Zn content increases, the magnitude of the Hall coefficient decreases in both T and T' phases, while the carrier density, estimated from a chemical analysis, remains constant. Possible mechanisms for this are discussed.

引用

页码：2885 / 2895

页数：11

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