Pauli-like magnetic susceptibility in emeraldine base polyaniline

被引:8
|
作者
Kahol, PK [1 ]
机构
[1] Wichita State Univ, Dept Phys, Wichita, KS 67260 USA
关键词
polymers; electronic transport;
D O I
10.1016/S0038-1098(02)00480-5
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
Magnetic susceptibility measurements on emeraldine base (EB) polyaniline are found to exhibit a Pauli-like behavior up to a temperature of 475 K. A simple albeit physically realistic model involving spin-pairs is shown to lead to such a dependence on temperature. The analysis of the data indicates that polarons in EB are created in pairs and that the intra-pair interactions encompass a broad distribution of antiferromagnetic exchange couplings. The results on EB are further shown to have essential implications for a correct interpretation of the magnetic susceptibility data in doped conducting polymers. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:93 / 96
页数:4
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