Title :
Microstructure improvement of thin Ru underlayer for CoCrPt-SiO2 granular perpendicular media
Author :
Mukai, Ryoichi ; Uzumaki, Takuya ; Tanaka, Atsushi
Author_Institution :
Adv. Magnetic Recording Lab., Fujitsu Lab. Ltd., Atsugi, Japan
Abstract :
The microstructure improvement of the thin Ru layer was discussed in order to achieve excellent recording performance of the granular-type perpendicular media. The recording layers of granular-type media were deposited on different Ru underlayers by rf magnetron sputtering method with a composite-type sputtering target that consists of CoCrPt and SiO2. The effects on the improvement of recording performances was analyzed. It was observed that the recording dependences of signal output and media noise are quite different but they show the same recording density dependences of signal-noise ratio (SNR). Realization of thin Ru underlayer for formation of high performance recording layer resulted in the investigation.
Keywords :
chromium alloys; cobalt alloys; crystal microstructure; magnetic recording noise; perpendicular magnetic recording; platinum alloys; ruthenium; silicon compounds; sputter deposition; CoCrPt-SiO2-Ru; granular perpendicular media; media noise; microstructure improvement; rf magnetron sputtering; signal output; signal-noise ratio; underlayer; Disk recording; Grain boundaries; Laboratories; MONOS devices; Magnetic recording; Magnetic separation; Microstructure; Perpendicular magnetic recording; Signal to noise ratio; Sputtering;
Conference_Titel :
Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International
Print_ISBN :
0-7803-9009-1
DOI :
10.1109/INTMAG.2005.1464221
