Title :
Nanogranular L10 FePt:C Composite films for perpendicular recording
Author :
Chen, J. ; Ding, Y. ; Lim, B.
Author_Institution :
Data Storage Inst., Singapore
Abstract :
FePt:C composite films with large magnetocrystalline anisotropy are in-situ fabricated in this study by sputter deposition. The microstructure and magnetic properties of the films are investigated using X-ray diffraction, transmission electron microscopy and polar magneto-optical Kerr analysis. Well-defined grain boundaries and relatively uniform grain with mean diameter of 5.6 nm are obtained by doping. Results show an increase in magnetisation as the C content is increased while the exchange coupling indicated by the steep slope of the hysteresis loop at coercivity remained very large. Further increasing of the C content however decreased the magnetisation.
Keywords :
Kerr magneto-optical effect; X-ray diffraction; carbon; coercive force; exchange interactions (electron); grain boundaries; iron alloys; magnetic hysteresis; magnetic thin films; nanostructured materials; perpendicular magnetic anisotropy; perpendicular magnetic recording; platinum alloys; sputter deposition; transmission electron microscopy; FePt:C; X-ray diffraction; coercivity; exchange coupling; grain boundaries; hysteresis loop; magnetic properties; magnetisation; magnetocrystalline anisotropy; microstructure; nanogranular composite films; perpendicular recording; polar magneto-optical Kerr analysis; sputter deposition; transmission electron microscopy; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic films; Magnetic properties; Magnetization; Microstructure; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Sputtering; X-ray diffraction;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.376199
