Spin dynamics in weakly and strongly interacting NiO nanoparticles

Christian Robert Haffenden Bahl, Kim Lefmann, Luise Theil Kuhn, Per-Anker Lindgård, Niels Bech Christensen, H.V. Melis, Steen Mørup

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The spin dynamics of plate-shaped nanoparticles of NiO has been studied by inelastic neutron scattering and Mossbauer spectroscopy. A value of the in-plane anisotropy energy constant significantly larger than the bulk value has been measured. The temperature and field dependence of the energy of the antiferromagnetic resonance mode associated with this in-plane anisotropy has been studied. Both Mossbauer spectroscopy and neutron scattering data show that the magnetic fluctuations are strongly affected by the strength of interparticle interactions.
Original languageEnglish
JournalJournal of Physics: Condensed Matter
Volume18
Issue number49
Pages (from-to)11203-11216
ISSN0953-8984
DOIs
Publication statusPublished - 2006

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