Effects of annealing condition on the structural and magnetic properties of FePt thin films

Author

Park, Chang Hoi ; Na, Jong Gab ; Jang, Pyung Woo ; Lee, Seong-Rae

Author_Institution

Div. of Metals, Korea Inst. of Sci. & Technol., Seoul, South Korea

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3034

Lastpage

3036

Abstract

Equiatomic FePt films were deposited by a dc sputtering method and annealed in the air and in a vacuum at 350°C for up to 60 min. The order-disorder transformation occurs almost entirely within 10 min and a very high coercivity of 6.8 kOe could be obtained in the air-annealed films while the transformation occured very slowly in the vacuum-annealed films. This higher transformation rate could be also verified in the X-ray diffraction analysis. The reason for the higher rate seems to be the diffusion of oxygen atoms and possible mechanism was discussed

Keywords

annealing; coercive force; crystal structure; diffusion; ferromagnetic materials; iron alloys; magnetic thin films; order-disorder transformations; permanent magnets; platinum alloys; sputtered coatings; 10 min; 350 C; 60 min; FePt; FePt thin films; O diffusion; X-ray diffraction analysis; air-annealed films; annealing condition; dc sputtering method; equiatomic FePt films; high coercivity; magnetic properties; order-disorder transformation; structural properties; vacuum-annealed films; Annealing; Coercive force; Iron; Magnetic analysis; Magnetic anisotropy; Magnetic films; Magnetic properties; Perpendicular magnetic anisotropy; Sputtering; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.801076

Filename

801076