Small polaron and bipolaron transport in antimony oxide doped barium hexaferrites

被引：38

作者：

Brahma, P ^{[1
]}

Banerjee, S

Chakraborty, S

Chakravorty, D

机构：

[1] Gurudas Coll, Calcutta 700054, W Bengal, India

[2] Univ Calcutta, Dept Phys, Calcutta 700009, W Bengal, India

[3] Indian Assoc Cultivat Sci, Calcutta 700032, W Bengal, India

来源：

JOURNAL OF APPLIED PHYSICS | 2000年 / 88卷 / 11期

关键词：

D O I：

10.1063/1.1309045

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Direct current electrical resistivity measurements on specimens with composition BaO (6-x) Fe2O3, x Sb2O3 With x having values of 0.0, 0.025, 0.05, 0.1, and 0.3, respectively, were carried out in the temperature range of 120-300 K. Chemical analyses showed the presence of Sb3+ and Sb5+ ions as well as Fe2+ and Fe3+ ions in the doped specimens. The doped specimens were found to have reduced resistivities. The analysis of the data shows that the electrical conductivity in this system arises due to a combined contribution of both small polaron hopping between Fe2+ and Fe3+ sites and bipolaronic transport between Sb3+ and Sb5+ sites. (C) 2000 American Institute of Physics. [S0021-8979(00)08320-1].

引用

页码：6526 / 6528

页数：3

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