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Properties of a new soft magnetic material

Author

Listed:
  • S. X. Wang

    (Stanford University)

  • N. X. Sun

    (Stanford University)

  • M. Yamaguchi

    (Research Institute of Electrical Communication, Tohoku University)

  • S. Yabukami

    (Research Institute of Electrical Communication, Tohoku University)

Abstract

The development of advanced electromagnetic devices has been constrained by a lack of soft magnetic materials with a suitably high saturation magnetization (over 20 kilogauss) and a large permeability roll-off frequency (greater than 1 gigaherz). For example, magnetic hard-disk-drive technology is rapidly approaching the perceived superparamagnetic limit at which the stored bits become thermally unstable1 — disks with higher anisotropy are more stable but are not usable because magnetic write heads become saturated. Here we describe a new soft magnetic material with a saturation magnetization of 24 kilogauss and a large permeability of 1,000–1,400 in a wide frequency range of up to about 1.2 gigaherz. This new material promises to have wide application in devices such as magnetic recording heads and integrated inductors.

Suggested Citation

  • S. X. Wang & N. X. Sun & M. Yamaguchi & S. Yabukami, 2000. "Properties of a new soft magnetic material," Nature, Nature, vol. 407(6801), pages 150-151, September.
    • Handle: RePEc:nat:nature:v:407:y:2000:i:6801:d:10.1038_35025142
    DOI: 10.1038/35025142
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    Cited by:

    1. Liuliu Han & Fernando Maccari & Ivan Soldatov & Nicolas J. Peter & Isnaldi R. Souza Filho & Rudolf Schäfer & Oliver Gutfleisch & Zhiming Li & Dierk Raabe, 2023. "Strong and ductile high temperature soft magnets through Widmanstätten precipitates," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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