Ferromagnetic resonance study of FeCoMoB microwires during devitrification process

被引：10

作者：

Klein, P. ^{[1
]}

Varga, R. ^{[1
]}

Infante, G. ^{[2
]}

Vazquez, M. ^{[2
]}

机构：

[1] Safarik Univ, Fac Sci, Inst Phys, Kosice 04154, Slovakia

[2] CSIC, Inst Ciencia Mat Madrid, Madrid 28049, Spain

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 111卷 / 05期

关键词：

GLASS-COATED MICROWIRES; DOMAIN-WALL DYNAMICS; MAGNETIC-PROPERTIES; COVERED WIRES; ALLOYS; FMR; ANISOTROPIES; RELAXATION; IMPEDANCE; FIELD;

D O I：

10.1063/1.3689789

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Magnetic properties of FeCoMoB glass-coated microwires with high positive magnetostriction have been investigated during the process of devitrification in the temperature range: 0-600 degrees C by ferromagnetic resonance (FMR) studies. The FeCoMoB microwire shows natural ferromagnetic resonance that reflects a complex anisotropy distribution. FMR spectrum for as cast sample shows up to four resonance maxima when ranging frequency from 10 MHz up to 11.3 GHz. After annealing, the anisotropy distribution becomes more regular and the number of FMR peaks decreases. The anisotropy and stress amplitude has been estimated from the FMR spectra, showing a strong decrease with annealing temperature and being low and constant for the nanocrystalline state. In addition, Gilbert damping decreases with annealing temperature, too. The low Gilbert damping (similar to 0.01) for the nanocrystalline state makes the nanocrystalline FeCoMoB microwire an ideal material for applications in which fast magnetization processes are required. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3689789]

引用

页数：7

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