Novel Nd2Fe14B nanoflakes and nanoparticles for the development of high energy nanocomposite magnets

Nilay G. Akdogan, George C. Hadjipanayis, David J. Sellmyer

Research output: Contribution to journalArticle

51 Scopus citations

Abstract

High energy ball milling has been shown to be a promising method for large-scale fabrication of rare earth-transition metal nanoparticles. In this work, magnetically hard Nd-Fe-B nanopowders with a coercivity in the range of 1.2-4kOe have been produced by surfactant-assisted ball milling of nanocrystalline precursor alloys. The nanopowders consisted of Nd 2Fe14B flakes with a thickness below 100nm and an aspect ratio as high as 102-103 and anisotropic square nanoparticles with a size of 11nm. Both the nanoparticles and nanoflakes showed a strong [001] out-of-plane texture. The nanoparticles showed a spin reorientation temperature which is lower (117K) than the bulk value (135K). The successful fabrication of Nd-Fe-B nano-thin flakes and anisotropic nanoparticles provides hope for the development of nanocomposite permanent magnets with an enhanced energy product.

Original languageEnglish (US)
Article number295705
JournalNanotechnology
Volume21
Issue number29
DOIs
Publication statusPublished - Jul 14 2010

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ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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