Title :
High magnetic field sensitivity of TbFeCo layer and Pt/Co multilayers with an ultra-thin RE-rich RE-TM layer
Author :
Ishida, Masaya ; Katsuyama, Takanobu ; Kawase, Takeo ; Nebashi, Satoshi ; Shimoda, Tatsuya
Author_Institution :
Seiko Epson Corp., Nagano, Japan
fDate :
9/1/1997 12:00:00 AM
Abstract :
We studied the magnetic field sensitivity of double layer disks which were composed of a TbFeCo recording layer with low Tb content and a high-Tc RE-rich DyFeCo ultra-thin layer. The Tb14Fe82Co4/Dy30Fe35 Co35 double layer disk has better magnetic field sensitivity than a TbFeCo single recording layer disk. It was found that the film having such a large magnetization as Tb14Fe82 Co4 can be used for MO materials. Furthermore, we investigated the Pt/Co multilayers as a recording layer with an ultra-thin RE-TM layer. The addition of the ultra-thin RE-rich TbCo layer on the Pt/Co multilayers is effective for improvement of the C/N and the field sensitivity as well as that on the TbFeCo recording layer
Keywords :
cobalt; cobalt alloys; dysprosium alloys; ferromagnetic materials; iron alloys; magnetic disc storage; magnetic domains; magnetic hysteresis; magnetic multilayers; magnetic thin films; magnetisation; magneto-optical recording; platinum; terbium alloys; C/N improvement; DyFeCo; MO materials; Pt-Co; Pt/Co multilayers; Tb14Fe82Co4-Dy30Fe 35Co35; Tb14Fe82Co4/Dy30Fe 35Co35 double layer disk; TbFeCo; TbFeCo recording layer; double layer disks; high magnetic field sensitivity; high-Tc RE-rich DyFeCo ultra-thin layer; large magnetization; magneto-optical system; ultra-thin RE-rich RE-TM layer; Disk recording; Iron; Magnetic fields; Magnetic films; Magnetic force microscopy; Magnetic materials; Magnetic modulators; Magnetic multilayers; Magnetic recording; Magnetization; Magnetooptic recording; Multilevel systems; Nonhomogeneous media; Optical films;
Journal_Title :
Magnetics, IEEE Transactions on
