Microstructure and intergranular diffusion in exchange-coupled Sm-Co/Fe nanocomposites

被引：39

作者：

Zhang, Ying ^{[1
,2
]}

Kramer, M. J. ^{[1
]}

Rong, Chuanbing ^{[2
]}

Liu, J. Ping ^{[2
]}

机构：

[1] US DOE, Ames Lab, Mat Sci & Engn, Ames, IA 50011 USA

[2] Univ Texas Arlington, Dept Phys, Arlington, TX 76019 USA

来源：

APPLIED PHYSICS LETTERS | 2010年 / 97卷 / 03期

关键词：

annealing; cobalt alloys; diffusion; electron energy loss spectra; exchange interactions (electron); iron alloys; nanocomposites; nanomagnetics; samarium alloys; transmission electron microscopy; PERMANENT-MAGNETS; ENERGY PRODUCT; CO;

D O I：

10.1063/1.3467202

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate homogenous distribution of bcc FeCo soft phase with grain size of 20-30 nm in the annealed Sm-Co/Fe bulk samples by energy filtered transmission electron microscopy (EFTEM). Quantitative Co/Fe interdiffusion measured using both energy dispersive spectroscopy (EDS) and parallel electron energy loss spectroscopy (PEELS) shows Fe60 +/- 5%Co40 +/- 5% for the magnetically soft bcc phase and Sm-2(Co0.82Fe0.18)(7) and Sm(Co0.80Fe0.20)(5) respectively for the magnetically hard phases in these two alloy systems after optimal annealing. The graded interface develops in both samples due to the Co/Fe interchange between the hard and soft phases and the bcc soft phase was determined. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3467202]

引用

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