Application of Mn-Zn Ferrite with Fine Grain Size to Magnetic Heads

Yutaka Yamamoto, Akihiro Makino

Research output: Contribution to journalArticlepeer-review

Abstract

The Mn-Zn ferrite ceramics with high density above 99.8% and fine grain size below 5 μm have been obtained by sintering of hydrothermal-precipitated ferrite powders at lower temperature than that in the ordinary process. Mn-Zn ferrite ceramics with grain sizes below 3 μ m have relative permeabilities comparable to that of commercial one in a frequency range above 5MHz. The single side MIG heads composed of ferrite with fine grain(Gs=2.3 μ m) are manufactured. The output voltage of the heads composed of the developed ferrite are equal to those of the heads composed of the commercial ferrite. The asymmetry instabilities of the heads composed of the developed ferrite are almost equal to those composed of the single crystal Mn-Zn ferrite which seemed to be good for the asymmetry instabilities. Therefore, Mn-Zn ferrite with fine grain sizes and high density is expected to be useful as magnetic head material for high density recording.

Original languageEnglish
Pages (from-to)881-885
Number of pages5
Journaljournal of the japan society of powder and powder metallurgy
Volume40
Issue number9
DOIs
Publication statusPublished - 1993

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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