Title :
Novel Electroless CoNiFe Soft Magnetic Underlayer on a Si Disk Substrate for Perpendicular Recording Media
Author :
Jyoko, Y. ; Tsumori, T. ; Ishii, M. ; Ohashi, K.
Author_Institution :
Fukui Nat. Coll. of Technol., Sabae
Abstract :
A novel electroless CoNiFe soft magnetic thin film is grown on a single-crystalline Si wafer disk substrate by electrochemical deposition. The microstructure, chemical composition, magnetization, and magnetic domain structure of the films are evaluated with the use of cross-sectional transmission electron microscopy, energy-dispersive X-ray analysis, vibrating sample magnetometer and surface magneto-optical Kerr effect analysis. Results show a highly fcc oriented nanocrystalline structure which exhibits no distinct magnetic domain walls with a large in-plane unidirectional magnetic anisotropy and a low magnetic coercivity.
Keywords :
Kerr magneto-optical effect; X-ray chemical analysis; cobalt alloys; coercive force; electrochemistry; electroless deposition; iron alloys; magnetic anisotropy; magnetic domains; magnetic thin films; nanostructured materials; nickel alloys; perpendicular magnetic recording; soft magnetic materials; transmission electron microscopy; CoNiFe; Si; chemical composition; cross-sectional transmission electron microscopy; electrochemical deposition; electroless soft magnetic underlayer; energy-dispersive X-ray analysis; fcc oriented nanocrystalline structure; magnetic coercivity; magnetic domain structure; magnetic domain walls; magnetization; microstructure; perpendicular recording media; single-crystalline wafer disk substrate; soft magnetic thin film; surface magneto-optical Kerr effect analysis; unidirectional magnetic anisotropy; vibrating sample magnetometer; Chemical analysis; Magnetic analysis; Magnetic anisotropy; Magnetic domain walls; Magnetic domains; Magnetic films; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Soft magnetic materials; Substrates;
Conference_Titel :
Magnetics Conference, 2006. INTERMAG 2006. IEEE International
Conference_Location :
San Diego, CA
Print_ISBN :
1-4244-1479-2
DOI :
10.1109/INTMAG.2006.375424
