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Effects of Co addition on microstructure and magnetic properties of ferromagnetic CoFeSiB alloy films

Authors
Chun, B. S.Kim, S. D.Kim, Y. S.Hwang, J. Y.Kim, S. S.Rhee, J. R.Kim, T. W.Hong, J. P.Jung, M. H.Kim, Y. K.
Issue Date
May-2010
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Keywords
Amorphous materials; Magnetic thin films; Magnetic properties; Crystal structure
Citation
ACTA MATERIALIA, v.58, no.8, pp.2836 - 2842
Journal Title
ACTA MATERIALIA
Volume
58
Number
8
Start Page
2836
End Page
2842
URI
https://scholarworks.sookmyung.ac.kr/handle/2020.sw.sookmyung/13220
DOI
10.1016/j.actamat.2010.01.006
ISSN
1359-6454
Abstract
A correlation between composition, microstructure, and magnetic properties of sputter-deposited CoFeSiB alloy films has been studied Various analytical tools and micromagmetic models were employed to understand the details of microstructural evolution and magnetic reversal processes, respectively The CoFeSiB alloy film shows significantly different microstructure and magnetic properties depend on the Co concentration When the Co concentration is below 75 at %, the alloy has an amorphous phase exhibiting magnetic softness with negative remanence Meanwhile, beyond 75 at %, the structure consists of nanocrystals precipitated in the amorphous matrix, which becomes magnetically hard with positive remanence as well as antiferromagnefic exchange coupling (C) 2010 Acta Materialia Inc Published by Elsevier Ltd All rights reserved
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