Nonmagnetic impurity effects on S=1/2 Heisenberg ladder Cu2(C5H12N2)2Cl4

被引：11

作者：

Deguchi, H ^{[1
]}

Sumoto, S

Takagi, S

Mito, M

Kawae, T

Takeda, K

Nojiri, H

Sakon, T

Motokawa, M

机构：

[1] Kyushu Inst Technol, Fac Engn, Dept Elect, Kitakyushu, Fukuoka, Japan

[2] Kyushu Univ, Fac Engn, Dept Appl Sci, Fukuoka 8128581, Japan

[3] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 980, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 11期

关键词：

D O I：

10.1143/JPSJ.67.3707

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Magnetic measurements have been performed to investigate nonmagnetic impurity effects on a Zn-doped ladder system (Cu1-xZnx)(2) (C5H12N2)(2)Cl-4. The paramagnetic contribution in the susceptibility chi' of the Zn-doped system increases with increasing x below the gap temperature. The susceptibility obeys the Curie law in the temperature range between 0.5 K and 2 K. However, at temperatures below 0.5 K, chi'T drops with decreasing temperature, which suggests the crossover in the Curie constant as predicted by Sigrist and Furusaki [J. Phys. Sec. Jpn. 65 (1996) 2385]. Magnetization curves of the Zn-doped system are compared with that of the pure system. The impurity-induced spin behaves like a paramagnetic S=1/2 spin and the spin-gap state survives even in the Zn-doped system with the content x up to 0.117. These results seem to originate from the weak interladder interaction of the system.

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收藏

页码：3707 / 3710

页数：4

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