Electromagnetic properties of manganese-zinc ferrite with lithium substitution

被引：37

作者：

De Fazio, E. ^{[2
]}

Bercoff, P. G. ^{[1
]}

Jacobo, S. E. ^{[2
]}

机构：

[1] Univ Nacl Cordoba, FAMAF, IFEG Conicet, RA-5000 Cordoba, Argentina

[2] Univ Buenos Aires, LAFMACEL, Fac Ingn, Buenos Aires, DF, Argentina

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2011年 / 323卷 / 22期

关键词：

MnZn ferrite; Magnetic nanoparticle; Lithium substitution; EM-wave absorber; MICROWAVE-ABSORPTION PROPERTIES; COMPLEX PERMEABILITY; WAVE ABSORBER;

D O I：

10.1016/j.jmmm.2011.06.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polycrystalline manganese-zinc ferrite with lithium substitution of composition Li(0.5x)Mn(0.4)Zn(0.6-x) Fe(2+0.5x)O(4) (0.0 <= x <= 0.4) was prepared by the usual ceramic method. X-ray diffraction analysis confirmed that the samples have a spinel structure and are of single phase for some values of Li content. Lithium doping considerably modifies saturation magnetization since its value increases from 57.5 emu/g for x=0.0 to 82.9 emu/g for x=0.4. Lithium inclusion increases the real permeability (over 1 MHz) while the natural resonance frequency shifts to lower values as the fraction of Li increases. These ferrites show good electromagnetic properties as absorbers in the microwave range of 1 MHz - 1 GHz. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：2813 / 2817

页数：5

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