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Browse Journals & Magazines > Applied Physics Letters ...> Volume:101 Issue:12 Help

Effect of Mg interlayer on perpendicular magnetic anisotropy of CoFeB films in MgO/Mg/CoFeB/Ta structure

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7 Author(s)
Ma, Q.L. ; WPI Advanced Institute for Materials Research, Tohoku University, 2-1-1, Katahira, 980-8577 Sendai, Japan ; Iihama, S. ; Kubota, T. ; Zhang, X.M.
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The effects of Mg metallic interlayer on the magnetic properties of thin CoFeB films in MgO/Mg (tMg)/CoFeB (1.2 nm)/Ta structures were studied in this letter. Our experimental result shows that the CoFeB film exhibits perpendicular magnetic anisotropy (PMA) when the CoFeB and MgO layers are separated by a metallic Mg layer with a maximum thickness of 0.8 nm. The origin of PMA was discussed by considering the preferential transmission of the Δ1 symmetry preserved by the Mg interlayer in crystallized MgO/Mg/CoFeB/Ta. In addition, the thin Mg interlayer also contributes to enhancing the thermal stability and reducing the effective damping constant and coercivity of the CoFeB film.

Published in:
Applied Physics Letters  (Volume:101 ,  Issue: 12 )

Date of Publication: Sep 2012

Page(s):
122414 - 122414-5
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.4754118
Product Type:
Journals & Magazines
Date of Current Version :
24 September 2012
Issue Date :
Sep 2012

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