Effects of In-Plane Magnetization Orientation on Magnetic and Electronic Properties in a Bcc Co (001)/Rock Salt MgO (001)/Bcc Co (001) Magnetic Tunnel Junction System: Ab Initio Calculations
- Authors
- Yoo, Dong Su; Chae, Kisung; Chung, Yong-Chae
- Issue Date
- Apr-2012
- Publisher
- AMER SCIENTIFIC PUBLISHERS
- Keywords
- Magnetic Tunnel Junction; Noncollinear; Density Functional Theory
- Citation
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.12, no.4, pp.3602 - 3605
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
- Volume
- 12
- Number
- 4
- Start Page
- 3602
- End Page
- 3605
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/165968
- DOI
- 10.1166/jnn.2012.5649
- ISSN
- 1533-4880
- Abstract
- Ab initio calculations were performed on a fully epitaxial bcc Co (001)/rock salt MgO (001)/bcc Co (001) magnetic tunnel junction system for two cases where the magnetization is parallel to bcc Co [100] and to bcc Co [110]. Structural optimization reveals that the two cases are equivalent systems and that the Co electrodes contract in the z-direction whereas the MgO insulating barrier expands. The magnetic moments of each monolayer vary slightly in each case; furthermore, only the magnetic moment at the surface of the Co atom shows any enhancement (12%). The layer decomposed density of states profiles reveals that the bonding character of the junction interface is derived mainly from the 2p-3d hybridization of the MgO and Co interfacial atoms.
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