Sum rules on the dynamic permeability of hexagonal ferrites

被引：29

作者：

Adenot, AL ^{[1
]}

Acher, O ^{[1
]}

Taffary, T ^{[1
]}

Longuet, L ^{[1
]}

机构：

[1] CEA Le Ripault, F-37260 Monts, France

来源：

JOURNAL OF APPLIED PHYSICS | 2002年 / 91卷 / 10期

关键词：

D O I：

10.1063/1.1447505

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A general sum rule has been established recently, bounding the integral of the gyromagnetic losses weighted by the frequency, by the square of the saturation magnetization [O. Acher and A. L. Adenot, Phys. Rev. B 62, 11324 (2000)]. This rule has been established for soft materials with internal anisotropy fields small compared to B-s. In this article, this result is extended to the case of hexagonal ferrites with strong planar anisotropy. It is shown that the bound on the integral is a simple expression of the saturation magnetization and of the out-of-plane anisotropy field. Experimental results on polycrystalline (Ba3Co2Fe24O41)-Co(2)Z and (BaCo1.25Ti1.25Fe9.5O19)-M hexagonal ferrites are presented. It is shown that the dynamic properties measured up to 18 GHz are bounded in agreement with our predictions. (C) 2002 American Institute of Physics.

引用

页码：7601 / 7603

页数：3

共 11 条

[1] Bounds on the dynamic properties of magnetic materials [J].