Magnetization process of epitaxial FePt film with granular structure

Microstructure and magnetization process of epitaxial FePt (0 0 1) thin films are investigated. The films have a granular structure for the thickness below about 300 Å. The 120 Å thick film exhibits a huge coercive force of 54 kOe at room temperature, but the loop does not show a good square shape....

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 1999-06, Vol.198, p.486-488
Main Authors: Goto, T, Ide, Y, Abe, H, Watanabe, K, Onagawa, J, Yoshida, H, Cadogan, J.M
Format: Article
Language:English
Subjects:
AFM image
Applied sciences
Coercive force
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Epitaxial growth
Exact sciences and technology
Granular structure
Magnetic properties and materials
Magnetic properties of monolayers and thin films
Magnetic properties of surface, thin films and multilayers
Magnetization process
Metals. Metallurgy
Physics
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Summary:Microstructure and magnetization process of epitaxial FePt (0 0 1) thin films are investigated. The films have a granular structure for the thickness below about 300 Å. The 120 Å thick film exhibits a huge coercive force of 54 kOe at room temperature, but the loop does not show a good square shape. The coexistence of single-domain small particles, multi-domain large particles and a little fault in epitaxial growth are responsible for the characteristic magnetization curve.
ISSN:0304-8853
DOI:10.1016/S0304-8853(98)01203-7