Title :
High coercivity hard disk with CoCrPtB/Cr media
Author :
Tani, N. ; Takahashi, T. ; Hashimoto, M. ; Ishikawa, M. ; Ota, Y. ; Nakamura, K.
Author_Institution :
ULVAC Japan Ltd., Chiba, Japan
fDate :
11/1/1991 12:00:00 AM
Abstract :
An investigation was made into material concentration of magnetic media used in hard disks to obtain higher coercivity. It was found that a slight addition of B in the magnetic layer of already known CoCrPt/Cr media could increase the coercivity significantly, to 3000 Oe or more. X-ray diffraction analysis indicates that coercivity increase by the added B element is caused by an intensified FCT(111) phase in Co(CrPtB) in the magnetic layer
Keywords :
X-ray diffraction examination of materials; boron alloys; chromium; chromium alloys; cobalt alloys; coercive force; ferromagnetic properties of substances; hard discs; magnetic recording; magnetic thin films; platinum alloys; sputtered coatings; CoCrPtB-Cr media; FCT(111) phase; X-ray diffraction analysis; high coercivity hard disk; magnetic media; material concentration; sputtered deposition; Chromium; Coercive force; Disk recording; Hard disks; Magnetic analysis; Magnetic materials; Magnetic recording; Saturation magnetization; Sputtering; Substrates;
Journal_Title :
Magnetics, IEEE Transactions on
