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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 27, Iss. 4 — Feb. 15, 1988
  • pp: 698–702

New magnetooptic head with a built-in generator for a bias magnetic field

Hiromichi Kobori, Teruo Murakami, and Masafumi Mori  »View Author Affiliations


Applied Optics, Vol. 27, Issue 4, pp. 698-702 (1988)
http://dx.doi.org/10.1364/AO.27.000698


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Abstract

A high performance magnetooptic head, which generates a bias magnetic field itself, has been developed. It has a moving magnet actuator to drive an objective lens. The moving magnets have two functions. One is to apply a constant magnetic field on the recording medium. The other is to comprise a magnetic circuit for focusing and tracking control. This magnetooptic head is suitable for use in the two-head erase and write method, in which it is not necessary to change the polarity of the bias magnetic field. Moreover, it enables designing a small-sized magnetooptic disk drive, because a bias magnetic field generator is built into the optical head.

© 1988 Optical Society of America

History
Original Manuscript: April 25, 1987
Published: February 15, 1988

Citation
Hiromichi Kobori, Teruo Murakami, and Masafumi Mori, "New magnetooptic head with a built-in generator for a bias magnetic field," Appl. Opt. 27, 698-702 (1988)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-27-4-698


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References

  1. I. Sander, “Digital Magneto-Optic Storage System,” in Technical Digest, Topical Meeting on Optical Data Storage (Optical Society of America, Washington, DC, 1983), paper THA2.
  2. M. Hartmann, “Erasable Magneto-Optical Recording Media,” IEEE Trans. Magn. MAG-20, 1013 (1984). [CrossRef]
  3. T. Murakami, K. Taira, M. Mori, “Magnetooptic Erasable Disk Memory with Two Optical Heads,” Appl. Opt. 25, 3986 (1986). [CrossRef] [PubMed]
  4. J. Simkin, C. W. Trowbridge, “On the Use of the Total Scalar Potential in the Numerical Solution of Field Problems in Electromagnetics,” Int. J. Num. Methods Eng. 14, 423 (1979). [CrossRef]
  5. T. Mizoguchi, I. Sakai, K. Inomata, “Nd-Fe-B-Co-Al Based Parmanent Magnets with Improved Magnetic Properties and Temperature Characteristics,” Appl. Phys. Lett. 48, 1309 (1986). [CrossRef]
  6. K. Ichihara, K. Taira, Y. Terashima, S. Shimanuki, N. Yasuda, “Highly Reliable TbCo Film for Erasable Optical Disk Memory,” in Technical Digest, Topical Meeting on Optical Data Storage (Optical Society of America, Washington, DC, 1985), paper WAA2.

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