Journal article
Spin Wave and Critical Fluctuations in Magnetite
Abstract
The long-wavelength spin dynamics of the ferrimagnet magnetite (Fe3O4) have been investigated at and below the critical temperature Tc. The magnetic fluctuations were observed in zero magnetic field near the (111) Bragg peak by triple axis neutron spectrometry. Well below Tc the dynamics can be described in terms of spin-wave excitations whose energy is Dq2. Over the temperature range 0.6>1 - T/Tc>0.01, D is found to vary as (Tc - T) to the …
Authors
Collins MF; Saunderson DH
Journal
Journal of Applied Physics, Vol. 41, No. 3, pp. 1433–1434
Publisher
AIP Publishing
Publication Date
March 1, 1970
DOI
10.1063/1.1658977
ISSN
0021-8979