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

被引：37
|
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]
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页数：3
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