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Browse Journals & Magazines > Journal of Applied Physics ...> Volume:101 Issue:9 Help

Structural analysis of the CoFeB thin film in Ru/CoFeB and MgO/CoFeB layers

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5 Author(s)
Kim, Dong Joon ; Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea ; Bae, Ji Young ; Lim, Woo Chang ; Kim, Kee Won
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In the last few years, magnetic tunnel junctions with MgO barrier have attracted attention due to the theoretically predicted and experimentally verified huge TMR. In the present work, crystallization behavior of CoFeB layer adjacent to the MgO or Ru layer was studied by annealing at various temperatures for 1 h. The crystallization started at MgO/CoFeB interface but crystallization temperature changed with materials and thickness of adjacent layer. When the thickness of MgO layer increased in MgO/CoFeB bilayer, crystallization temperature decreased. This strongly suggests that B from CoFeB layer diffused into adjacent layer to crystallize at lower temperature and MgO can serve as a sink of B. Details will be discussed.

Published in:
Journal of Applied Physics  (Volume:101 ,  Issue: 9 )

Date of Publication: May 2007

Page(s):
09B505 - 09B505-3
ISSN :
0021-8979
Digital Object Identifier :
10.1063/1.2713431
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
May 2007

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