Applicability of effective medium theory to ferroelectric/ferrimagnetic composites with composition and frequency-dependent complex permittivities and permeabilities

被引：119

作者：

Mantese, JV ^{[1
]}

Micheli, AL ^{[1
]}

Dungan, DF ^{[1
]}

Geyer, RG ^{[1
]}

BakerJarvis, J ^{[1
]}

Grosvenor, J ^{[1
]}

机构：

[1] NATL INST STAND & TECHNOL, DIV ELECTROMAGNET FIELDS, BOULDER, CO 80303 USA

来源：

JOURNAL OF APPLIED PHYSICS | 1996年 / 79卷 / 03期

关键词：

D O I：

10.1063/1.361010

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-frequency (1 MHz-1 GHz) transmission line measurements were used to determine the composition and frequency-dependent complex permittivities and complex permeabilities of ferroelectric/ferrimagnetic (barium titanate and a magnesium-copper-zinc ferrite) composites. The effective medium rules of Maxwell-Garnett give both lower and upper bounds for the effective permittivities and permeabilities and yield accurate estimates of the bulk electric and magnetic properties at low volume fill fraction of either component provided the proper host matrix is chosen. Bruggeman theory yielded the best predictive values for the permittivity and permeability over the entire composition range. In all cases these complex quantities were shown to be constrained by Bergman-Milton bounds. (C) 1996 American Institute of Physics.

引用

页码：1655 / 1660

页数：6

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