AC CONDUCTIVITY IN BISMUTH-SUBSTITUTED BARIUM HEXAFERRITES

被引：14

作者：

PAL, M ^{[1
]}

BRAHMA, P ^{[1
]}

CHAKRAVORTY, D ^{[1
]}

机构：

[1] GURUDAS COLL,CALCUTTA,W BENGAL,INDIA

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1994年 / 63卷 / 09期

关键词：

AC CONDUCTIVITY; BISMUTH-SUBSTITUTED BARIUM HEXAFERRITES; OVERLAPPING-LARGE-POLARON TUNNELING;

D O I：

10.1143/JPSJ.63.3356

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Bismuth substituted barium hexaferrites in the composition series BaO.(6-x) Fe2O3.xBi(2)O(3) with 0<x<0.5 have been prepared and their electrical conductivity measured over the temperature range 325 to 510 K. The ac conductivity of the samples obeys a relation sigma(omega) similar to omega(s) with s having values in the range 0.5 to 0.8. The electrical conductivity is believed to arise due to the creation of Fe2+ sites by the reducing action of Bi3+ ions. The ac conductivity variation is explained on the basis of overlapping-large-polaron-tunnelling (OLPT) mechanism.

引用

页码：3356 / 3360

页数：5

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