Novel Aspects of Magnetic Interactions in a Macroscopic 3D Nanoparticle-Based Crystal

O. Kasyutich, R. D. Desautels, B. W. Southern, and J. van Lierop
Phys. Rev. Lett. 104, 127205 – Published 26 March 2010

Abstract

We report magnetic measurements on a macroscopic three-dimensional fcc array of iron-oxide nanoparticles. We observe typical nanomagnetism for the randomly packed configuration of nanoparticles, including dynamical freezing and superparamagnetism. By contrast, the nanoparticle “atoms” in the fcc configuration that form the crystal exhibit a low coercivity that is weakly temperature dependent with no superparamagnetism up to 400 K.

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  • Received 6 August 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.127205

©2010 American Physical Society

Authors & Affiliations

O. Kasyutich1, R. D. Desautels2, B. W. Southern2, and J. van Lierop2

  • 1H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Royal Fort, Bristol, BS8 1TL, United Kingdom
  • 2Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, R3T 2N2, Canada

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Issue

Vol. 104, Iss. 12 — 26 March 2010

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