FePt-Ordered Alloy Films With (001) Orientation Fabricated With FeCoB Soft Magnetic Under Layer

Author

Tanaka, Mitsuru ; Gomi, S. ; Ogata, Y. ; Nakagawa, Sachiko

Author_Institution

Dept. of Phys. Electron., Tokyo Inst. of Technol., Tokyo, Japan

Volume

47

Issue

10

fYear

2011

Firstpage

3151

Lastpage

3153

Abstract

FePt films with (001) preferential orientations can be prepared on a thick MgO underlayer with (100) orientation formed on FeCoB soft magnetic underlayer (SUL) with (100) orientation. The Fe[3 nm]/Pt[3 nm] bilayer could be grown epitaxially on the MgO underlayer with (100) aligned texture and the bilayer transformed into (001)-textured L1₀-FePt films after annealing at 600^°C. Perpendicular coercivity of 8.4 kOe was achieved on a thick MgO underlayer with (100) orientation formed on FeCoB SUL. In-plane M-H loop shows no magnetic anisotropy but it holds relatively soft magnetic properties. Coercitivities along easy and hard axis direction were 39 and 43 Oe, respectively.

Keywords

annealing; boron alloys; cobalt alloys; coercive force; iron alloys; magnesium compounds; magnetic hysteresis; magnetic multilayers; magnetic thin films; perpendicular magnetic recording; platinum alloys; soft magnetic materials; sputter deposition; texture; (001) preferential orientations; (001)-textured L1₀-FePt films; (100) aligned texture; (100) orientation; Fe-MgO-FeCoB-MgO-Fe-Pt; Fe-Pt bilayer; FeCoB soft magnetic underlayer; FePt-ordered alloy films; annealing; easy axis direction; hard axis direction; in-plane M-H loop; perpendicular coercivity; relatively soft magnetic properties; temperature 600 degC; thick MgO underlayer; Annealing; Epitaxial growth; Iron; Magnetic anisotropy; Perpendicular magnetic recording; Substrates; $L 1_{0}$-FePt; FeCoB; MgO; perpendicular recording; soft underlayer (SUL);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2157111

Filename

6028103