Title :
Magnetic properties and microstructure of CoCrW films for longitudinal recording media
Author :
Miyamoto, Takashi ; Nakai, Junichi ; Matsumura, Hitomi ; Yoshikawa, Kazuo ; Kuwabara, Masago ; Visokay, Mark ; Saffari, Haydee
Author_Institution :
Kobe Steel Ltd., Hyogo, Japan
fDate :
11/1/1995 12:00:00 AM
Abstract :
The magnetic properties and microstructure of CoCrW films were studied. A series of media with an identical structure but with a different CoCrM alloy film, where element M was varied, as the recording layer were deposited, and the capability of these alloy films as recording films was tested in view of the intergranular magnetic coupling in films. It is suggested that the intergranular magnetic coupling in CoCrW is reduced as much as that of CoCrTa. Anisotropy fields of grains in CoCrW films are almost the same as those in CoCrTa films. However, in-plane orientation of C-axes of Co alloy grains are higher than that of CoCrTa due to the better lattice matching to (100) textured Cr underlayer, and as a result they yield higher Hc, S and S*
Keywords :
chromium alloys; cobalt alloys; coercive force; ferromagnetic materials; magnetic anisotropy; magnetic recording; magnetic thin films; tungsten alloys; CoCrW; CoCrW films; Cr underlayer; anisotropy fields; coercivity; grain orientation; intergranular magnetic coupling; lattice matching; longitudinal recording media; magnetic properties; microstructure; Anisotropic magnetoresistance; Chromium alloys; Couplings; Magnetic anisotropy; Magnetic films; Magnetic properties; Magnetic recording; Microstructure; Perpendicular magnetic anisotropy; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
