Magnetic Properties of Isolated FePt-C Nanocomposited Films

Author

Jiang, Changjun ; Chen, Jingsheng ; Ju, Ganping ; Chow, GanMoog

Author_Institution

Dept. of Mater. Sci. & Eng., Nat. Univ. of Singapore, Singapore, Singapore

Volume

46

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1914

Lastpage

1917

Abstract

The microstructures and magnetic properties of FePtC films grown on MgO/CrRu/glass substrates under different sputtering parameters were systematically investigated. Increased temperature induced chemical ordering and the increase of coercivity. The microstructures of FePtC film showed a two-layer structure with a granular layer above a continuous underlying layer. With increasing sputtering pressure (PÂ¿Â¿), the intensity of FePt (001) peak initially increased, and then decreased when P_Ar Â¿ 20 mTorr. At 20 mTorr, H_c value increased to ~9.5 kOe, and only one magnetic layer was observed with increase of P_Ar ~ 50 mTorr. An increase of sputtering power at high pressures will further improve the magnetic isolation of FePt grains.

Keywords

carbon; coercive force; crystal microstructure; iron alloys; magnetic recording; magnetic thin films; nanocomposites; platinum alloys; sputter deposition; FePt-C; MgO-CrRu-SiO₂; SiO₂; chemical ordering; coercivity; glass substrates; granular layer; isolated nanocomposited films; magnetic isolation; magnetic layer; magnetic properties; magnetic recording; microstructures; sputtering pressure; two-layer structure; underlying layer; Argon; Chemicals; Coercive force; Glass; Magnetic films; Magnetic properties; Microstructure; Sputtering; Substrates; Temperature; FePt; microstructure; perpendicular magnetic recording; well isolated grain;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2010.2042145

Filename

5467434