Title :
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
fDate :
6/1/2010 12:00:00 AM
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 (P¿¿), the intensity of FePt (001) peak initially increased, and then decreased when PAr ¿ 20 mTorr. At 20 mTorr, Hc value increased to ~9.5 kOe, and only one magnetic layer was observed with increase of PAr ~ 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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2010.2042145
