title: Band structure and density of States effects in co-based magnetic tunnel junctions.
abstract: Utilizing Co/Al(2)O(3)/Co magnetic tunnel junctions with Co electrodes of different crystalline phases, a clear relationship between electrode crystal structure and junction transport properties is presented. For junctions with one fcc(111) textured and one polycrystalline (polyphase and polydirectional) Co electrode, a strong asymmetry is observed in the magnetotransport properties, while when both electrodes are polycrystalline the magnetotransport is essentially symmetric. These observations are successfully explained within a model based on ballistic tunneling between the calculated band structures (density of states) of fcc-Co and hcp-Co.
authors.affiliation: Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands.
authors.forename: P
authors.initials: P
authors.lastname: LeClair
authors.forename: J T
authors.initials: JT
authors.lastname: Kohlhepp
authors.forename: C H
authors.initials: CH
authors.lastname: van De Vin
authors.forename: H
authors.initials: H
authors.lastname: Wieldraaijer
authors.forename: H J M
authors.initials: HJ
authors.lastname: Swagten
authors.forename: W J M
authors.initials: WJ
authors.lastname: de Jonge
authors.forename: A H
authors.initials: AH
authors.lastname: Davis
authors.forename: J M
authors.initials: JM
authors.lastname: MacLaren
authors.forename: J S
authors.initials: JS
authors.lastname: Moodera
authors.forename: R
authors.initials: R
authors.lastname: Jansen