Investigation of magnetic anisotropy and magnetization process of tetragonal distorted FeCo multilayer films

Tetragonal distorted [Rh/FeCo(1.5nm)]n (n=1–4) multilayer films with strong perpendicular magnetic anisotropy(PMA) were successfully deposited on MgO (100) substrates. Magnetic properties and dynamic magnetization reversal process of the multilayer films have been investigated. With the repeat numbe...

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Bibliographic Details
Published in:Materials letters 2015-12, Vol.160, p.238-241
Main Authors: Zhang, Luran, Liu, Liwang, Ishio, Shunji
Format: Article
Language:English
Subjects:
Anisotropy
Deposition
Distortion
Dynamic tests
Magnesium oxide
Magnetic materials
Magnetic properties
Magnetization
Multilayer structure
Multilayers
Thin films
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Summary:Tetragonal distorted [Rh/FeCo(1.5nm)]n (n=1–4) multilayer films with strong perpendicular magnetic anisotropy(PMA) were successfully deposited on MgO (100) substrates. Magnetic properties and dynamic magnetization reversal process of the multilayer films have been investigated. With the repeat number of Rh/FeCo bilayer(n) increases from 1 to 4, effective uniaxial anisotropy(Keff) increases from 2.86×106erg/cm3 to 7.37×106erg/cm3. For Rh/FeCo(1.5nm) film, the reversal is governed by the magnetic moments reverse and domain wall movement. For [Rh\FeCo(1.5nm)]n (n=2–4) films, the top FeCo layer reverses firstly, then other layers reverse gradually. These different reversal behaviors arise from the demagnetization energy and exchange coupling between FeCo layers and multilayer films. •Perpendicular anisotropy is obtained in [Rh/FeCo(1.5nm)]n multilayer films.•With the repeat number(n) increases, effective uniaxial anisotropy(Keff) increases.•Dynamic magnetization reversal process of multilayers was studied by Kerr microscopy.•The reversal is governed by the magnetic moments reverse and domain wall movement.•When n=2–4, the top layer reverses firstly then other layers reverse gradually.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2015.07.087