Forbidden frequency gaps in magnonic spectra of ferromagnetic layered composites

被引：54

作者：

Krawczyk, M

Lévy, JC

Mercier, D

Puszkarski, H

机构：

[1] Univ Paris 07, Lab Phys Theor Mat Condensee, F-75251 Paris, France

[2] Adam Mickiewicz Univ, Fac Phys, Surface Phys Div, PL-61614 Poznan, Poland

来源：

PHYSICS LETTERS A | 2001年 / 282卷 / 03期

关键词：

spin waves; magnetic composites; forbidden gaps; ferromagnetic multilayers;

D O I：

10.1016/S0375-9601(01)00172-4

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Spin wave spectra in layered composite materials are computed by means of a transfer matrix method with evidence for existence of numerous frequency gaps. Essential properties of these spectra are successfully explained within the framework of approximate models of independent films or an effective medium, according to the strength (strong and weak, respectively) of the magnetization and exchange contrasts; this includes an evidence of the existence of resonance states, for which both materials are simultaneously excited. (C) 2001 Elsevier Science B.V. All rights reserved.

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页码：186 / 194

页数：9

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