Perpendicular Magnetic Tunnel Junctions Having CoFeB/CoPt Alloy Layers

Title
Perpendicular Magnetic Tunnel Junctions Having CoFeB/CoPt Alloy Layers
Authors
최경민민병철신경호
Keywords
Magnetic tunnel junctions (MTJs)
Issue Date
2012-03
Publisher
IEEE transactions on magnetics
Citation
VOL 48, NO 3, 1130-1133
Abstract
We have fabricated perpendicular magnetic tunnel junctions consisting of hcp Ru underlayer/hcp CoPt alloy/CoFeB/MgO/CoFeB/CoPt alloy (or Co)/Pt capping layer. By inserting the CoPt alloy (or Co) between the CoFeB and Pt capping layers, it is possible to increase a perpendicular magnetic anisotropy of the top electrode. Using a top electrode of , we have obtained an effective magnetic anisotropy of and a tunnel magnetoresistance (TMR) of 9.4%. The analysis of the crystal structure reveals that the low TMR is a consequence of the fcc (111) texture of CoFeB layers.
URI
http://pubs.kist.re.kr/handle/201004/42137
ISSN
00189464
Appears in Collections:
KIST Publication > Article
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