AC CONDUCTIVITY IN CU-CR FERRITES

被引：30

作者：

AHMED, MA

ELHITI, MA

MOSAAD, MM

ATTIA, SM

机构：

[1] TANTA UNIV,FAC EDUC,DEPT PHYS,KAFR AL SHEIKH,EGYPT

[2] TANTA UNIV,FAC SCI,DEPT PHYS,TANTA,EGYPT

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1995年 / 146卷 / 1-2期

关键词：

D O I：

10.1016/0304-8853(94)01630-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Samples of the type CuFe2-xCrxO4 with n = 0.0, 0.2, 0.4, 0.6 and 0.8 were prepared. Ac conductivity measurements were carried out at different frequencies up to 10(5) Hz and at various temperatures from room temperature up to about 550 K. The ac conductivity was measured using the phase detector technique (lock-in amplifier). The results showed that the conductivity increases with both temperature and frequency, and the activation energy in the paramagnetic region is higher than that in the ferrimagnetic region. At high temperatures the conductivity becomes frequency independent. We conclude that the conductivity in these ferrites consists of two kinds of conduction mechanisms.

引用

页码：84 / 88

页数：5