Physics of the Solid State

, Volume 47, Issue 7, pp 1358–1364 | Cite as

Elastic-stress relaxation in compacted nanocrystalline CuO

  • T. I. Arbuzova
  • S. V. Naumov
  • E. A. Kozlov
Low-Dimensional Systems and Surface Physics

Abstract

The magnetic properties of two types of nanocrystalline antiferromagnetic CuO samples, namely, dense nanoceramics and loose powders, were studied. For nanomaterials with smaller particles, the magnetic susceptibility χ was shown to increase with a decrease in temperature T < TN. The increase in χ in both series of samples is related to the disordering of Cu2+ spins at the surfaces of nanoparticles. The magnetic properties of nanopowders characterize the properties of isolated nanoparticles. In a dense nanoceramic, the size effect is compensated for by the interaction between nanoparticles. The magnetic properties of nanoceramics are determined by elastic stresses induced by an external action. Elastic-stress relaxation results in the recovery of magnetic order and decreases the magnetic susceptibility.

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Copyright information

© Pleiades Publishing, Inc. 2005

Authors and Affiliations

  • T. I. Arbuzova
    • 1
  • S. V. Naumov
    • 1
  • E. A. Kozlov
    • 2
  1. 1.Institute of Metal Physics, Ural DivisionRussian Academy of SciencesYekaterinburgRussia
  2. 2.Zababakhin All-Russia Research Institute of Applied PhysicsRussian Federal Nuclear CenterSnezhinsk, Chelyabinsk oblastRussia

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