DYNAMICS OF MAGNETIC NANOPARTICLES STUDIED BY NEUTRON-SCATTERING

Authors
HANSEN MF BODKER F MORUP S LEFMANN K CLAUSEN KN LINDGARD PA
Citation
Mf. Hansen et al., DYNAMICS OF MAGNETIC NANOPARTICLES STUDIED BY NEUTRON-SCATTERING, Physical review letters, 79(24), 1997, pp. 4910-4913
Citations number
17
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
79
Issue
24
Year of publication
1997
Pages
4910 - 4913
Database
ISI
SICI code
0031-9007(1997)79:24<4910:DOMNSB>2.0.ZU;2-U
Abstract
We present the first triple-axis neutron scattering measurements of ma gnetic fluctuations in nanoparticles using an antiferromagnetic reflec tion. Both the superparamagnetic relaxation and precession modes in si milar to 15 nm hematite particles are: observed. The results have been consistently analyzed on the basis of a simple model with uniaxial an isotropy and the Neel-Brown theory for the relaxation.