Magneto-optical recording

Basic physics and current technologies of magneto-optical recording are reviewed. The development owes much to the discovery of amorphous rare earth-transition metal (RE-TM) films, which exhibit quite uniform magnetic and optical properties in the scale of practical interest. The RE-TM films also exhibit a wide variety of thermomagnetic properties on adjusting their composition, which resulted in the recent development of high-density recording using multilayer films. In amorphous RE-TM films it is possible to record thermomagnetically marks some several tens of nanometres in size. In order to readout such small recorded marks, further development of new readout techniques is necessary.

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

[2]  Bruce D. Terris,et al.  Near‐field optical data storage using a solid immersion lens , 1994 .

[3]  T. Shiratori,et al.  Proc. Magneto-Optical Recording Int. Symp. '97 , 1998 .

[4]  K. Fukamichi,et al.  Ferromagnetic‐spin glass transition in Fe‐Zr amorphous alloy system , 1982 .

[5]  S. Kirkpatrick,et al.  Modified mean‐field model for rare‐earth–iron amorphous alloys , 1976 .

[6]  Masud Mansuripur,et al.  The Physical Principles of Magneto-optical Recording , 1995 .

[7]  Peter Francis Carcia,et al.  Perpendicular magnetic anisotropy in Pd/Co thin film layered structures , 1985 .

[8]  S. Charap,et al.  Thermal stability of recorded information at high densities , 1996 .

[9]  Eiichi Fujii,et al.  HIGH-DENSITY MAGNETO-OPTICAL RECORDING WITH DOMAIN WALL DISPLACEMENT DETECTION , 1998 .

[10]  Masahiko Takahashi,et al.  Study on recorded domain characteristics of magneto‐optical TbFeCo disks , 1988 .

[11]  J. F. Ready,et al.  MnBi Thin Films: Physical Properties and Memory Applications , 1968 .

[12]  B. R. Brown,et al.  Optical data storage potential of six materials. , 1974, Applied optics.

[13]  M. Erman,et al.  PtMnSb, a material with very high magneto‐optical Kerr effect , 1983 .

[14]  G. Kino,et al.  Solid immersion microscope , 1990 .

[15]  M. Kryder,et al.  Near‐field magneto‐optics and high density data storage , 1992 .

[16]  H. Oechsner.  Energieverteilungen bei der Festkörperzerstäubung durch Ionenbeschuß , 1970 .

[17]  H. W. van Kesteren,et al.  Hysteresis, microstructure, and magneto‐optical recording in Co/Pt and Co/Pd multilayers , 1991 .

[18]  H. Saga,et al.  High Density Thermomagnetic Recording on Flux Detectable RE-TM Media , 1999 .

[19]  Norio Ohta,et al.  Magnetic domain expansion readout for amplification of an ultra high density magneto‐optical recording signal , 1996 .

[20]  Mely Chen Chi,et al.  Random anisotropy in amorphous ferromagnets , 1978 .

[21]  Shinji Takayama,et al.  Single ion model for perpendicular magnetic anisotropy in RE-TM amorphous films , 1987 .

[22]  S. Ohnuma,et al.  Magnetic properties of (Fe, Co and Ni) - Zr amorphous alloys , 1980 .

[23]  F. G. Foster,et al.  Magnetic Writing on Thin Films of MnBi , 1957 .

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

[25]  T. Yamada,et al.  Kerr‐effect enhancement and improvement of readout characteristics in MnBi film memory , 1974 .

[26]  Y. Mimura,et al.  Magnetic properties of amorphous alloy films of Fe with Gd, Tb, Dy, Ho, or Er , 1978 .

[27]  G. S. Kino,et al.  High-numerical-aperture lens system for optical storage , 1993 .

[28]  H. Saga,et al.  A New Perpendicular Magnetic Recording Method with a Magnetic -Optical Common Preformat , 1999 .

[29]  S. Tsunashima,et al.  Structural and Magnetic Anisotropy of Tb/Fe Multilayers , 1997 .

[30]  Merle,et al.  Ultrafast spin dynamics in ferromagnetic nickel. , 1996, Physical review letters.

[31]  Kenji Ohta,et al.  Improvement of readout resolution with an in-plane magnetization film for a magneto-optical disk , 1994 .

[32]  Kenji Ohta,et al.  New Magnetic Recording Method Using Laser Assisted Read/Write Technologies , 1999 .

[33]  Ryan,et al.  Magnetic properties of iron-rich Fe-Zr glasses. , 1987, Physical review. B, Condensed matter.

[34]  23.8 Gb/in.2 areal density demonstration , 2000 .

[35]  P. Bloemen,et al.  Magnetic anisotropy of multilayers , 1991 .