Magnetic Properties of Nanocrystalline Materials

Akihisa Inoue, Akihiro Makino, Teruo Bitoh

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Citations (Scopus)

Abstract

This chapter discusses the magnetic properties of nanocrystalline materials. The development of new soft magnetic materials with excellent characteristics of high magnetic flux density (Bs)of more than 1.5T combined with high ?e of more than 105 at 1kHz was achieved by nanocrystallization of Fe-Zr-Nb-B-Cu amorphous alloys. The Cu-free quaternary Fe85.5Zr2Nb4B8.5 alloy which exhibits high Bs of 1.64T and high ?e of 6.0 × 104 at 1kHz simultaneously, was also developed. In addition, it was found that the simultaneous addition of 1 at% P and 0.1 at% Cu to the Nb-poor Fe85Nb6B9 alloy results in good magnetic properties of high Bs of more than 1.6T and high ?e of more than 4 × 104 at 1 kHz as well as good productivity. Furthermore, the dissolution of oxygen in the remaining amorphous phase caused significant improvement of high-frequency permeability of 103 in the frequency range 1 to 100 MHz by a drastic increase in ?RT to 103??m. Considering that these characteristics had not been previously reported, nanostructure control is concluded to be a useful method for the development of new types of high functional materials. The future progress of nanostructure-controlled materials is expected to enable the fabrication of new materials exhibiting useful characteristics which have not been achieved for conventional materials.

Original languageEnglish
Title of host publicationNanostructured Materials
Subtitle of host publicationProcessing, Properties, and Applications: Second Edition
PublisherElsevier Inc.
Pages487-536
Number of pages50
ISBN (Print)9780815515340
DOIs
Publication statusPublished - 2006 Dec 1

ASJC Scopus subject areas

  • Materials Science(all)

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