title: Electron holography study of remanence states in exchange-biased MnPd/Fe bilayers grown epitaxially on MgO(001).
abstract: We investigated magnetic remanence states of epitaxially grown, exchange-biased MnPd/Fe bilayers by electron holography emphasizing the crystallographic orientations of the layers. Thin-foil transmission electron microscopy (TEM) specimens were carefully prepared along both hard and easy axes of the Fe layer. The ex situ magnetization-reversal process was carried out using the TEM specimens, and magnetic flux densities of the ultra-thin Fe layers were evaluated at different remanence states. We show that a spin configuration in the TEM specimens is determined by the competition between an exchange coupling at the MnPd/Fe bilayer interface, shape anisotropy of TEM specimens and intrinsic magnetocrystalline anisotropy of Fe.
authors.affiliation: Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai, Japan. jsjeong@tagen.tohoku.ac.jp
authors.forename: Jong Seok
authors.initials: JS
authors.lastname: Jeong
authors.forename: Zentaro
authors.initials: Z
authors.lastname: Akase
authors.forename: Daisuke
authors.initials: D
authors.lastname: Shindo
authors.forename: Qing-Feng
authors.initials: QF
authors.lastname: Zhan
authors.forename: Kannan M
authors.initials: KM
authors.lastname: Krishnan
mesh_terms: D016880:Anisotropy; D003461:Crystallography; D004583:Electrons; D006696:Holography / Q000379:methods*; D007091:Image Processing, Computer-Assisted; D007501:Iron / Q000737:chemistry*; D008277:Magnesium Oxide / Q000737:chemistry*; D008280:Magnetics; D046529:Microscopy, Electron, Transmission; D049329:Nanostructures / Q000737:chemistry; D013048:Specimen Handling
chemical_list: D008277:Magnesium Oxide; D007501:Iron