Frequency-dependent loss tangent and power factor of magnetic fluids

被引：9

作者：

Fannin, PC ^{[1
]}

Giannitsis, AT

Charles, SW

机构：

[1] Univ Dublin Trinity Coll, Dept Elect & Elect Engn, Dublin 2, Ireland

[2] Univ Coll N Wales, Dept Chem, Bangor LL57 2UW, Gwynedd, Wales

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 226卷

关键词：

magnetic fluids; magnetic losses; susceptibility;

D O I：

10.1016/S0304-8853(00)00828-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Measurement of the frequency-dependent loss tangent, tan delta, and power factor, sin delta, over the frequency range 20 MHz-6 GHz, of four magnetic fluids, namely fluids 1, 2, 3 and 4, with particle packing fractions of 0.18, 0.09, 0.036 and 0.018 are reported. The loss parameters are presented in terms of the complex susceptibility components, chi(omega) = chi'(omega) - i chi "(omega), of the samples and it is shown that in the case of fluid 4 the frequency-dependent profiles of chi ", tan delta and sin delta are almost identical. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：1887 / 1889

页数：3