Anomalous muon-spin relaxation in the Zn-substituted YBa2Cu3-2yZn2yO7-δ around the hole concentration of 1/8 per Cu

被引：33

作者：

Akoshima, M

Koike, Y

Watanabe, I

Nagamine, K

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Appl Phys, Aoba Ku, Sendai, Miyagi 9808579, Japan

[2] RIKEN, Inst Phys & Chem Res, Muon Sci Lab, Wako, Saitama 3510198, Japan

[3] KEK, MSL, High Energy Accelerator Res Org, Inst Mat Struct Sci,Meson Sci Lab, Tsukuba, Ibaraki 3050801, Japan

来源：

PHYSICAL REVIEW B | 2000年 / 62卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.62.6761

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Muon-spin relaxation (mu SR) measurements were carried out in the partially Zn-substituted Y-123 system, YBa2Cu3-2yZn2yO7-delta, to investigate the so-called 1/8 effect. The muon-spin depolarization rate has been found to he anomalously enhanced at low temperatures in the Zn-substituted samples around the hole concentration per Cu in the CuO2 plane p similar to 1/8, as observed in the case of the Zn-substituted Bi2Sr2Ca1-xYx(Cu1-yZny)(2)O8+delta With p similar to 1/8. This indicates slowing down of the Cu-spin fluctuations at p 1/8. It appears that a small amount of Zn ions are effective for the enhancement of the magnetic correlation between Cu spins at p similar to 1/8. It has been concluded that the 1/8 effect exists in the Y-123 system and is common to all high-T-c cuprates.

引用

页码：6761 / 6765

页数：5

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