Title :
Microstructure and magnetic properties of CoPtCr-SiO/sub 2/ perpendicular recording media
Author :
Oikawa, Takanori ; Nakamura, Mitsutoshi ; Uwazumi, H. ; Shimatsu, T. ; Muraoka, Hiroaki ; Nakamura, Yoshihiko
Author_Institution :
Fuji Electr. Corp. R&D Ltd., Matsumoto, Japan
Abstract :
Summary form only given. Well-segregated grain structure with narrow c-axis distribution is required for CoCrPt based perpendicular recording layers. However, the enhancement of epitaxial growth of the CoCrPt grains by using Ru of CoCr seed layers, for example, is likely to prevent the Cr segregation to the grain boundary, resulting in the increase of intergranular exchange coupling. In this study, SiO/sub 2/ was added to the CoPtCr recording layer to enhance the grain segregation, and microstructure, magnetic properties, and recording performances for these media were discussed.
Keywords :
chromium alloys; cobalt alloys; crystal microstructure; grain boundary segregation; interface structure; magnetic multilayers; perpendicular magnetic recording; platinum alloys; silicon compounds; CoCr seed layers; CoCrPt based perpendicular recording layers; CoCrPt grain epitaxial growth; CoPtCr recording layer; CoPtCr-SiO/sub 2/; CoPtCr-SiO/sub 2/ perpendicular recording media; Cr grain boundary segregation; intergranular exchange coupling; magnetic properties; microstructure; narrow c-axis distribution; recording performances; segregated grain structure; Amorphous magnetic materials; Disk recording; Epitaxial growth; Grain boundaries; Magnetic properties; Magnetic recording; Magnetic superlattices; Magnetization; Microstructure; Perpendicular magnetic recording;
Conference_Titel :
Magnetics Conference, 2002. INTERMAG Europe 2002. Digest of Technical Papers. 2002 IEEE International
Conference_Location :
Amsterdam, The Netherlands
Print_ISBN :
0-7803-7365-0
DOI :
10.1109/INTMAG.2002.1001311
