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MAGNETIC HEADS FOR HIGH COERCIVITY RECORDING MEDIA

V. N. Samofalov1,* , E. I. Il’yashenko2, A. Ramstad3, L.Z. Lub’yanuy1, T. H. Johansen4

Affiliation

  1. National Technical University “Kharkov Polytechnical Institute”, 21 Frunze St., 61002, Kharkov, Ukraine
  2. Moscow State University, Vorob’eovi Gori,119899 Moscow, Russia
  3. Tandberg Storage, Kjelsåsveien 161, P.O. Box 196, Kjelsås, N-0411 Oslo, Norway
  4. University of Oslo, Department of Physics, Blindern, N-0316 Oslo, Norway

Abstract

The application of high coercive storage media would increase density, realiability and lifetime for thermal decay of recording information. The systems of permanent magnets generating strong magnetic fields are proposed to create the heads for recording on high coercive media (HC = 5-15 kOe). On the basis of calculations made for different magnet systems, the possibility of dense longitudinal and perpendicular recording was grounded..

Keywords

Permanent magnet, Stray field, Demagnetization, Giant anisotropy, Coercive force.

Submitted at: April 26, 2004
Accepted at: June 22, 2004

Citation

V. N. Samofalov, E. I. Il’yashenko, A. Ramstad, L.Z. Lub’yanuy, T. H. Johansen, MAGNETIC HEADS FOR HIGH COERCIVITY RECORDING MEDIA, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 3, pp. 911-916 (2004)