Investigation of (Fe,Co)NbB-Based Nanocrystalline Soft Magnetic Alloys by Lorentz Microscopy and Off-Axis Electron Holography

被引：4

作者：

Zheng, Changlin ^{[1
]}

Kirmse, Holm ^{[1
]}

Long, Jianguo ^{[2
]}

Laughlin, David E. ^{[2
]}

McHenry, Michael E. ^{[2
]}

Neumann, Wolfgang ^{[1
,3
]}

机构：

[1] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[2] Carnegie Mellon Univ, Dept Mat Sci & Engn, Pittsburgh, PA 15213 USA

[3] Univ Oregon, Dept Chem, Eugene, OR 97403 USA

来源：

MICROSCOPY AND MICROANALYSIS | 2015年 / 21卷 / 02期

基金：

美国国家科学基金会;

关键词：

TEM; electron holography; Lorentz microscopy; soft magnetic alloy; nanocrystalline; METALLIC FERROMAGNETIC MATERIALS; DOMAIN-WALL DYNAMICS; EXCHANGE INTERACTIONS; TEMPERATURE;

D O I：

10.1017/S1431927614013592

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The relationship between microstructure and magnetic properties of a (Fe,Co)NbB-based nanocrystalline soft magnetic alloy was investigated by analytical transmission electron microscopy (TEM). The microstructures of (Fe0.5Co0.5)(80)Nb4B13Ge2Cu1 nanocrystalline alloys annealed at different temperatures were characterized by TEM and electron diffraction. The magnetic structures were analyzed by Lorentz microscopy and off-axis electron holography, including quantitative measurement of domain wall width, induction, and in situ magnetic domain imaging. The results indicate that the magnetic domain structure and particularly the dynamical magnetization behavior of the alloys strongly depend on the microstructure of the nanocrystalline alloys. Smaller grain size and random orientation of the fine particles decrease the magneto-crystalline anisotropy and suggests better soft magnetic properties which may be explained by the anisotropy model of Herzer.

引用

页码：498 / 509

页数：12

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