DOPING-INDUCED MAGNETIC PHASE-TRANSITION IN POLY(3-ALKYLTHIOPHENES)

被引:13
作者
BARTA, P
NIZIOL, S
LEGUENNEC, P
PRON, A
机构
[1] EDF DER,CIMA MPE,F-77250 MORET SUR LOING,FRANCE
[2] UNIV MIN & MET KRAKOW,FAC MAT SCI & CERAM,PL-30059 KRAKOW,POLAND
[3] TECH UNIV WARSAW,DEPT CHEM,PL-00664 WARSAW,POLAND
来源
PHYSICAL REVIEW B | 1994年 / 50卷 / 05期
关键词
D O I
10.1103/PhysRevB.50.3016
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The dopant-agent-pi system magnetic interactions in FeCl4-doped poly(3-alkylthiophenes) (PAT's) have been studied. In particular, PAT's were subjected to magnetic susceptibility and magnetization measurements. The main goal of the experiments was to obtain temperature and magnetic-field dependencies of the above-mentioned magnetic quantities. The PAT samples were doped with ferric trichloride to different doping levels. The susceptibility and magnetization studies have shown that in the doped conjugated system the transition from a paramagentic phase to an ordered phase occurs as the temperature is lowered. The magnetic interactions observed are associated with the dopant-agent-charge-carrying-species antiferromagnetic coupling. The coupling is stabilized by a retro or forward virtual charge transfer between the impurity molecule and the polymer chain.
引用
收藏
页码:3016 / 3024
页数:9
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