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
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  and to bcc Co . 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.
Document Type: Research Article
Publication date: 2012-04-01
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