Correlation of the physico chemical properties of Zn-substituted Li-La ferrite

被引：16

作者：

Ahmed, MA ^{[1
]}

Okasha, N

Ebrahem, A

机构：

[1] Cairo Univ, Fac Sci, Dept Phys, Giza, Egypt

[2] Ain Shams Univ, Dept Phys, Fac Girls, Cairo, Egypt

[3] Yonsei Univ, Dept Phys, Inst Appl Phys, Seoul 120749, South Korea

来源：

CERAMICS INTERNATIONAL | 2005年 / 31卷 / 03期

关键词：

electrical properties; magnetic properties; ferrites; thermoelectric power; Li-Zn-La ferrites;

D O I：

10.1016/j.ceramint.2004.05.017

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The electrical resistivity, magnetic susceptibility, and the thermoelectric power of Zn-substituted Li-La mixed ferrite with formula Li0.5-0.5xZnxLayFe2.5-0.5x-yO4 at 0.1 <= x <= 0.9; y = 0.04 were studied as a function of temperature and frequency. X-ray analysis and Seebeck coefficient measurement were carried out in order to assure the formation of the sample in single spinel phase and to know the type of charge carriers participating in the conduction mechanism. The dependence of the electrical resistivity of Li-Zn ferrite on Zn content and temperature is explained on the basis of the cation distribution. The transition from the ferromagnetic to paramagnetic state is accompanied by an increase in the thermo EME Li-Zn ferrite shows n- and p-types conductivity due to the presence of Fe2+ ions. The creation of lattice vacancies is due to the presence of Li ions which give rise of p-type conductivity. (c) 2004 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：361 / 369

页数：9

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