ESR in conducting polymers: Oxygen-induced contribution to the linewidth

被引：96

作者：

Houze, E

Nechtschein, M

机构：

[1] Départment de Recherche Fondamentale sur la Matière Condensée, Service dșEtude des Structures et Architectures Moléculaires, Laboratoire de Physique des Métaux Synthétiques, Commissariat à lșEnergie Atomique-Grenoble, 38054, Grenoble, Cedex 9, rue des Mart

来源：

PHYSICAL REVIEW B | 1996年 / 53卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.53.14309

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The oxygen-induced ESR line broadening has been investigated in the case of the conducting polymer polyaniline in powder and in film form. Pumping under vacuum results in a narrowing of the ESR linewidth. After initial pumping various oxygen containing gases have been applied to the sample (pure O-2, ambient air, dry air) and the linewidth has been measured as a function of time. The residual water in these gases was found to seriously affect the narrowing behavior of the linewidth. A theoretical calculation is proposed showing that the line broadening is proportional to the oxygen concentration and to the polaron mobility. Considering the linewidth dependence upon applied oxygen pressure an evaluation of the polaron mobility is obtained. This value is consistent with the values estimated from previous spin dynamics studies. An evaluation of the exchange integral is also given.

引用

页码：14309 / 14318

页数：10

共 35 条

[1] OXYGEN-INDUCED ESR LINE BROADENING IN CONDUCTING POLYMERS [J].