Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-27T20:01:57.698Z Has data issue: false hasContentIssue false
  • English
  • Français

Materials for Magneto-Optical Recording

Published online by Cambridge University Press:  31 January 2011

Masahiko Kaneko
Get access

Abstract

This article describes the characteristics and development of materials for magnetooptical (MO) recording. Magneto-optical recording is derived from thermomagnetic recording and readout by the magneto-optical effect. Rare-earth/transition-metal alloys, mostly Tb-Fe-Co, have been used for recording materials in MO discs. MO discs were first put on the market in 1988. Magnetic-field modulation for recording was introduced in MiniDisc (MD) systems in 1992. MO discs have an advantage in durability and achievability, because recording by magnetization reversal is not accompanied by any atomic movement. Magnetically induced super-resolution (MSR), reported in 1991, enabled resolving powers that are higher than the optical limit. MO discs based on MSR were commercialized as 3.5–in. discs for data recording and as 2–in. discs for digital cameras.

As extensions of MSR, DWDD (domain-wall displacement detection) and MAMMOS (magnetic amplifying magneto-optical system) have been proposed, in which the marks are expanded during readout for a large signal. DWDD technology has been used in Hi-MDs (high-density MiniDiscs), which were commercialized in 2004 with storage capacities of 1 Gbyte per 64-mm-diameter disc.

Keywords

magneticmagneto-opticalmemory.
Type
Research Article
Information
MRS Bulletin , Volume 31 , Issue 4: Materials for Optical Data , April 2006 , pp. 314 - 317
Copyright
Copyright © Materials Research Society 2006

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1Williams, H.J.Sherwood, R.C.Foster, F.G. and Kelley, E.M.J. Appl. Phys. 28 (1957) p. 1181.CrossRefGoogle Scholar
2Imamura, N. and Ohta, C.Jpn. J. Appl. Phys. 19 (1980) p. L731.CrossRefGoogle Scholar
3Tamada, S.Igarashi, S.Sakamoto, S.Nakayama, H.Yoshida, M. and Nakane, Y.Jpn. J. Appl. Phys. 28 Supp1. 28–3 (1989) p. 67.CrossRefGoogle Scholar
4Yoshida, T.Proc. IEEE 82 (1994) p. 1492.CrossRefGoogle Scholar
5Aratani, K.Fukumoto, A.Ohta, M.Kaneko, M. and Watanabe, K.Proc. SPIE 1499 (1991) p. 209.CrossRefGoogle Scholar
6Kaneko, M.Aratani, K. and Ohta, M.Jpn. J. Appl. Phys. 31 (1992) p. 568.CrossRefGoogle Scholar
7Fukumoto, A. and Kubota, S.Jpn. J. Appl. Phys. 31 Part 1 (1992) p. 529.CrossRefGoogle Scholar
8Matsumoto, K. and Shono, K.J. Magn. Soc. Jpn. 19 Suppl. S1 (1995) p. 335.Google Scholar
9Murakami, Y.Iketani, N.Nakajima, J.Takahashi, A.Ohta, K. and Ishikawa, T.J. Magn. Soc. Jpn. 17 Suppl. S1 (1993) p. 201.Google Scholar
10Shiratori, T.Fujii, E.Miyaoka, Y. and Hozumi, Y.J. Magn. Soc. Jpn. 22 Suppl. S2 (1998) p. 47.Google Scholar
11Kaneko, M.Sakamoto, T. and Nakaoki, A.IEEE Trans. Magn. 35 (1999) p. 3112.CrossRefGoogle Scholar
12Birukawa, M.Hino, Y.Nishikiori, K.Uchida, K.Shiratori, T.Hiroki, T.Miyaoka, Y. and Hozumi, Y.Trans. Magn. Soc. Jpn. 2 (2002) p. 273.CrossRefGoogle Scholar
13Awano, H.Ohnuki, S.Shirai, H. and Ohta, N.Appl. Phys. Lett. 69 (1996) p. 4257.CrossRefGoogle Scholar
14Itoh, A.Ota, N.Uchiyama, T.Awano, H.Imai, S.Ishizaki, O.Tani, M.Iketani, N.Mieda, T.Takahashi, A.Uchihara, K.Nakata, M.Tezuka, K.Nakagawa, K. and Tsukamoto, A.Trans. Magn. Soc. Jpn. 4 (2004) p. 135.CrossRefGoogle Scholar