Strongly in-plane magnetized FePt thin film on ultrathin Fe underlayer

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The effect of ultrathin Fe underlayer on the strong in-plane magnetization of FePt magnetic thin film was investigated. This FePt thin film could be attained using the ultrathin Fe underlayer with 1 nm thickness. The in-plane coercivity of FePt film with 20 nm thickness grown on ultrathin Fe underlayer was high up to 7400 Oe. However, its out-of-plane coercivity was extremely low to 350 Oe compared to those of FePt thin films in other conventional studies. This result indicates that FePt thin film was strongly in-plane magnetized by ultrathin Fe underlayer. The strong ordering phase transformation kinetics and the high texturing to in-plane direction of the FePt thin film by ultrathin Fe underlayer were confirmed by Kinetics Monte Carlo (KMC) simulation and XRD measurement result, respectively. It is also supposed that they are associated with the reduction of an interface free energy between the film and the substrate with an introduction of ultrathin underlayer. (C) 2011 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2011-07
Language
English
Article Type
Article
Keywords

ANISOTROPY; COERCIVITY; TEXTURE; LAYERS; MEDIA

Citation

PHYSICA B-CONDENSED MATTER, v.406, no.13, pp.2646 - 2649

ISSN
0921-4526
DOI
10.1016/j.physb.2011.04.007
URI
http://hdl.handle.net/10203/94662
Appears in Collection
RIMS Journal Papers
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