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Journal of Applied Physics / Volume 101 / Issue 9 / PROCEEDINGS OF THE TENTH JOINT MMM/INTERMAG CONFERENCE / Magneto-Optic Recording and Alternative Magnetic Storage

J. Appl. Phys. 101, 09H501 (2007); http://dx.doi.org/10.1063/1.2710546 (3 pages)

Effect of switching field gradient for thermally assisted magnetic recording

F. Akagi, T. Matsumoto, and K. Nakamura

Hitachi, Ltd., Central Research Laboratory, 1-280 Kokubunji-shi, Tokyo 185-8601, Japan

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(Received 22 October 2006; accepted 4 December 2006; published online 2 April 2007)

The effects of the switching field gradient and the optimal head-field intensity for thermally assisted magnetic recording were investigated using the Landau-Lifshitz-Gilbert equation, which adds a stochastic thermal field to an effective field. The switching field gradient was defined as the product of a space gradient of temperature dT/dx and a temperature gradient of anisotropy field dHk/dT under condition of the uniform head-field intensity. The signal-to-noise ratio at 1000 kfci was found to improve with increasing dT/dx and by applying the optimal dHk/dT.

© 2007 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. CALCULATION METHOD
  3. RESULTS
  4. CONCLUSION

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KEYWORDS and PACS

Keywords

magnetic switching, thermomagnetic recording, stochastic processes

PACS

  • 75.30.Sg

    Magnetocaloric effect, magnetic cooling

  • 75.50.Ss

    Magnetic recording materials

  • 85.70.Li

    Other magnetic recording and storage devices (including tapes, disks, and drums)

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.2710546

PUBLICATION DATA

ISSN

0021-8979 (print)  
1089-7550 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    H. Saga, H. Nemoto, H. Sukeda, and M. Takahashi, Jpn. J. Appl. Phys., Part 1 38, 1839 (1999)JAPIAU000091000010006595000001.


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