Role of the residual amorphous phase in the intergranular magnetic coupling in nanocrystalline magnetic alloys

K. Suzuki, J. M. Cadogan

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Abstract

The temperature dependence of the coercivity (Hc) in nanocrystalline Fe91Zr7B2 samples with various fractions of the residual amorphous phase (Vam) has been investigated with particular attention paid to the role of the residual amorphous phase in determining the intergranular magnetic coupling. Hc. in the temperature range above the Curie temperature of the residual amorphous phase (Tam C) decreases significantly with decreasing Vam. On the contrary, Hc in the temperature range «Tam c increases slightly with decreasing Vam. These result suggest that the intergranular magnetic coupling is dominated by the intergranular distance in the temperature range > Tam C whereas it is independent of the intergranular distance well below Tam C.

Original languageEnglish
Pages (from-to)229-230
Number of pages2
JournalJournal of Magnetism and Magnetic Materials
Volume203
Issue number1-3
DOIs
Publication statusPublished - 1 Jan 1999
Externally publishedYes

Keywords

  • Coercivity
  • Exchange coupling
  • Nanocrystalline soft magnetic alloys
  • Random anisotropy model

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