Field dependent susceptibility of the 2D ferromagnet (CH3NH3)2CuCl4 in the paramagnetic phase

被引：7

作者：

Becerra, CC ^{[1
]}

Paduan, A ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis, BR-05389970 Sao Paulo, Brazil

来源：

SOLID STATE COMMUNICATIONS | 2003年 / 125卷 / 02期

基金：

巴西圣保罗研究基金会;

关键词：

ferromagnet; magnetic susceptibility; critical exponents;

D O I：

10.1016/S0038-1098(02)00703-2

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The temperature dependence of the ac susceptibility (chi) at constant applied magnetic field was investigated in the paramagnetic region of the quasi-2D ferromagnet (CH3NH3)(2)CuCl4. Above the Curie temperature (T-C = 8.85 K) a maximum in the chi(T,H) curves was observed at T-m(H). The temperature at the maximum increases with increasing applied field. This anomaly is related to short range fluctuations close the order transition. The behavior of T-m(H) is governed by the gap exponent of the scaling function (Delta = gamma + beta). We found Delta = 2.2 +/- 0.1 in very good agreement with the previously known values of gamma and beta. (C) 2003 Published by Elsevier Science Ltd.

引用

页码：99 / 101

页数：3

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