Complex high-frequency magnetization dynamics and magnetoimpedance in thin films

被引：3
|
作者：
da Silva, R. B. [1 ]
Viegas, A. D. C.
Correa, M. A.
de Andrade, A. M. H.
Sommer, R. L.
机构：
[1] Univ Fed Santa Maria, Dept Fis, CCNE, BR-97105900 Santa Maria, RS, Brazil
[2] CBPF, BR-22290180 Rio De Janeiro, Brazil
来源：
PHYSICA B-CONDENSED MATTER | 2006年 / 384卷 / 1-2期
关键词：
transverse permeability; amorphous thin films; FMR; nanocrystals;
D O I：
10.1016/j.physb.2006.05.218
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
High-frequency differential magnetic permeability and magnetoimpedance measurements were performed in Fe73.5CU1Nb3Si13.5B9 as-made and annealed thin films at frequencies up to 1.8 GHz. The results show complex dynamical properties characterized by multiple ferromagnetic resonance modes at relatively low frequencies for the amorphous as-made sample. After the thermal treatments, the resonance frequencies increase drastically exceeding the upper limit of 1.8 GHz for our equipment. This increase can possibly associated to higher local magnetic fields that are, in turn, associated to the formation of nanocrystalline grains randomly oriented. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：172 / 174
页数：3
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