Prospects for nanoparticle-based permanent magnets

Authors

Balamurugan Balamurugan, University of Nebraska-LincolnFollow
David J. Sellmyer, University of Nebraska-LincolnFollow
George C. Hadjipanayis, University of DelawareFollow
Ralph Skomski, University of Nebraska-LincolnFollow

Date of this Version

9-2012

Citation

Published in Scripta Materialia 67:6 (September 2012), pp. 542–547; doi: 10.1016/j.scriptamat.2012.03.034

Comments

Copyright © 2012 Acta Materialia Inc. Published by Elsevier Ltd. Used by permission.

Abstract

Magnetic nanoparticles smaller than ~15 nm in diameter and with high magnetocrystalline anisotropies K1 ≥ 1 MJ m−3 can be used as building blocks for next-generation permanent magnets. Advances in processing steps are discussed, such as self-assembly, alignment of the easy axes and appropriate nanostructuring that will enable the fabrication of densely packed nanoparticle assemblies with improved permanent-magnet properties. This study also proposes an idealized nanocomposite structure for nanoparticle-based future permanent magnets with enhanced energy products.