期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 320, 期 20, 页码 E860-E864出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2008.04.131
关键词
spinel ferrite; complex permeability; composite materials; return loss
Substituted Li ferrites with chemical composition Li(0.5+0.5t-0.5x)Fe(2.5-1.5t-0.5x)Ti(t)Zn(x)O(4), where t = 0.55 and x = 0.1, 0.2, 0.3 and 0.4 with additions of 0.005 Bi(2)O(3) and 0.05 MnO(2) were synthesised by a ceramic method and selected parameters such as Curie temperature T(c), saturation induction B(s) and coercivity H(c) were measured and discussed. The complex permeability of prepared ferrites was measured in the frequency range of 1 MHz-1GHz using impedance spectroscopy. The permeability spectra have shown the characteristic frequency dispersion and the contributions of relaxation and resonance effects to this dispersion are also discussed. The observed dispersion resulted from the contributions of the resonance-type of domain wall motion superimposed over the relaxation-type of wall displacements or magnetisation rotation. The detected resonance can be explained by the existence of demagnetising fields due to worse grain axis continuity. (C) 2008 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据