A sample of isolated disc shaped NiO nanoparticles was studied at the RITA-II triple axis spectrometer at SINQ (PSI) using the newly implemented multi-analyser blade imaging mode. The particles were 13 nm in diameter and had a thickness of about 2.5 nm. A non-dispersive spin excitation was observed at the antiferromagnetic ((1)/(2) (1)/(2) (1)/(2)) reflection at a scattering vector of kappa = 1.30 angstrom(-1), at an energy of 2 0.51 +/- 0.02 meV. This is shown to be due to uniform magnetic excitations in the nanoparticles. (c) 2006 Elsevier B.V. All rights reserved.
Physica B: Condensed Matter, 2006, Vol 385-386, Issue Part 1, p. 398-400
Energiteknologier på vej; Nanomagnetism; Uniform magnetic excitations; Uncompensated spins
Main Research Area:
8th International Conference on Neutron Scattering, 2006