Critical assessment of the physics underlying direct overwrite in magneto‐optic recording (invited)

The basic requirements for achieving direct overwrite in magneto‐optic recording are discussed from the basic physics of localized magnetization reversal during thermomagnetic recording. The operating principles and the key issues are reviewed and critically assessed for several major direct overwrite approaches including beam modulation using single‐layer media, beam modulation using exchange‐coupled multilayers, and magnetic field modulation.

[1]  B. Jacobs,et al.  Recording experiments on rare-earth transition-metal thin films studied with Lorentz microscopy , 1989, International Magnetics Conference.

[2]  Thermomagnetic direct overwrite in TbFe using thermally induced domain wall energy gradient , 1988 .

[3]  Hideki Akasaka,et al.  Direct Overwrite by Light Power Modulation on Magneto-Optical Multi-Layered Media , 1987 .

[5]  Erase process in a direct‐overwrite magneto‐optic recording material , 1989 .

[7]  Han-Ping D. Shieh,et al.  Magneto‐optic recording materials with direct overwrite capability , 1986 .

[9]  Direct overwrite in magneto‐optical recording , 1988 .

[10]  D. Rugar,et al.  Magnetooptic direct overwrite using a resonant bias coil , 1988 .

[11]  Han-Ping D. Shieh,et al.  Operating margins for magneto-optic recording materials with direct overwrite capability , 1987 .

[12]  Hisao Tsuji,et al.  Magnetization Process of Exchange-Coupled Ferrimagnetic Double-Layered Films , 1981 .

[13]  Paul H. Siegel,et al.  Recording Results And Coding Considerations For The Resonant Bias Coil Overwrite Technique , 1989, Photonics West - Lasers and Applications in Science and Engineering.

[14]  M. Kryder,et al.  Improved methods of direct overwrite in magneto-optical recording media , 1989, International Magnetics Conference.

[15]  Katsuhisa Aratani,et al.  Overwriting On A Magneto-Optical Disk With Magnetic Triple Layers By Means Of The Light Intensity Modulation Method , 1989, Photonics West - Lasers and Applications in Science and Engineering.

[16]  Jacobus Josephus Maria Ruigrok,et al.  Design and performance of magnetic heads for magneto‐optic recording with magnetic field modulation , 1988 .

[17]  Daniel Rugar,et al.  Thermomagnetic writing in Tb‐Fe: Modeling and comparison with experiment , 1988 .

[18]  B. G. Huth.  Calculations of Stable Domain Radii Produced by Thermomagnetic Writing , 1974 .

[19]  K. Ohashi,et al.  Magnetic After-Effect in Amorphous Tb-Fe Thin Films , 1980 .

[20]  Shigenori Okamine,et al.  High Speed Overwritable Magneto-Optic Recording , 1987 .

[21]  Nobutake Imamura,et al.  Magneto-Optical Recording Characteristics of TbFeCo Media by Magnetic Field Modulation Method , 1987 .