Combinatorial exploration of rare-earth-free permanent magnets: Magnetic and microstructural properties of Fe-Co-W thin films

被引：42

作者：

Gao, T. R. ^{[1
]}

Wu, Y. Q. ^{[2
]}

Fackler, S. ^{[1
]}

Kierzewski, I. ^{[1
]}

Zhang, Y. ^{[2
]}

Mehta, A. ^{[3
]}

Kramer, M. J. ^{[2
,4
]}

Takeuchi, I. ^{[1
]}

机构：

[1] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[2] Iowa State Univ, Ames Lab, Ames, IA 50011 USA

[3] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

[4] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 02期

关键词：

ANISOTROPY; ALLOYS; ATOMS;

D O I：

10.1063/1.4775581

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated the magnetic and structural properties of Fe-Co-W films using a composition spread technique. From the magnetometry measurements, large magnetization (900 emu/cm(3)) and enhanced perpendicular coercive fields (2-3 kOe) of low W concentration films were observed. The synchrotron diffraction results show a structural transition from a crystalline to an amorphous state and the crystallization onset increases with increasing W concentration. The SEM and TEM characterizations show that the films with low W concentrations have vertically standing platelet-like grain structures which is ascribed to the enhanced coercive fields. Magnetometry studies indicate that as the W concentration increases, microstructural change results in evolution of magnetization reversal mechanism. (C) 2013 American Institute of Physics. [ http://dx.doi.org/10.1063/1.4775581]

引用

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