Mediated exchange interaction in Fe-Nb-B nanocrystalline soft magnetic materials

Youhui Gao, Daisuke Shindo, Teruo Bitoh, Akihiro Makino

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The magnetic interactions between bcc Fe nanocrystalline particles in (formula presented) nanocrystalline soft magnetic alloys are in situ studied by electron holography. Wavy lines of magnetic flux inside magnetic domains reveal local magnetization fluctuations of magnetic ripple structure, which result from the interplay between the exchange and magnetostatic interactions. The longitudinal wavelength decreases with an increase in temperature. It is found that the local stray field greatly weakens the intergranular exchange coupling and reduces the coupled volume at elevated temperatures. The thermal magnetic behaviors of nanocrystalline soft magnetic alloys are explained.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number17
DOIs
Publication statusPublished - 2003 May 29

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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