期刊
APPLIED PHYSICS LETTERS
卷 93, 期 19, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.2978325
关键词
chromium; cobalt alloys; diffusion; iron; magnets; samarium alloys; sputtering; stoichiometry; transmission electron microscopy
资金
- ONR/MURI [N00014-05-1-049]
- U.S. Department of Energy, Office of Science [DE-AC02-07CH11358]
The microstructure of a magnetron sputtered Cr(20 nm)/Sm-Co(20 nm)/Fe(20 nm)/Cr(5 nm) exchange spring magnet was studied using an advanced analytical transmission electron microscopy to better understand the relationship between its chemistry and structure to enhance the energy product. It is shown that the Fe atoms diffuse into the well textured Sm-Co layer, causing a transition from the stoichiometric Sm2Co7 near the Sm-Co/Cr interface to a defected Sm(Co,Fe)(5) in the Sm-Co-Fe intermixed area. The graded intermixed layer between Sm-Co and pure Fe gives rise to a compositionally enhanced energy product.
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