Temperature dependence of core loss in cobalt substituted Ni-Zn-Cu ferrites

被引：42
|
作者：
Lucas, A. [1 ,2 ]
Lebourgeois, R. [1 ]
Mazaleyrat, F. [2 ]
Laboure, E. [2 ,3 ]
机构：
[1] THALES R&T, F-91767 Palaiseau, France
[2] ENS Cachan, SATIE, F-94235 Cachan, France
[3] SUPELEC, LGEP, F-91192 Gif Sur Yvette, France
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2011年 / 323卷 / 06期
关键词：
NiZnCu ferrite; Cobalt substitution; Core loss versus temperature; Permeability; MAGNETIC-PROPERTIES; PERMEABILITY;
D O I：
10.1016/j.jmmm.2010.10.037
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The temperature dependence of core loss in cobalt substituted Ni-Zn-Cu ferrites was investigated. Co2+ ions are known to lead to a compensation of the magneto-crystalline anisotropy in Ni-Zn ferrites, at a temperature depending on the cobalt content and the Ni/Zn ratio. We observed similar behaviour in Ni-Zn-Cu and it was found that the core loss goes through a minimum around this magneto-crystalline anisotropy compensation. Moreover, the anisotropy induced by the cobalt allowed a strong decrease of core loss, a ferrite having a core loss of 350 mW/cm(3) at 80 degrees C was then developed (measured at 1.5 MHz and 25 mT). This result represents an improvement of a factor 4 compared to the state of art Ni-Zn ferrites. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：735 / 739
页数：5
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