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Magnetic properties ofγ-Fe2O3dispersed particles: size and matrix effects

Authors
Journal
Journal of Magnetism and Magnetic Materials
0304-8853
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/j.jmmm.2003.12.171
Keywords
  • Magnemite
  • Ferrites
  • Hysteresis
  • Surfaces
  • Interfaces
  • Anisotropy

Abstract

Abstract Static properties (0–5.5 T, 2–300 K) of γ-Fe 2O 3 5- and 9-nm particles trapped in a silica xerogel (Fe/Si=0.01−0.44 mol/mol) give evidence of strains. Comparing with dispersions in a polyvinylic alcohol suggests that the temperature dependence of the coercivity could reflect an intrinsic interparticle interaction effect.

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