Observation of a central mode in an exchange-coupled singlet-groundstate system
- 28 July 1977
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 10 (14), 2673-2678
- https://doi.org/10.1088/0022-3719/10/14/019
Abstract
A central mode in the ferromagnetic phase transition of Pr3Tl is observed by inelastic and quasielastic neutron scattering. The integrated intensity has a Lorentzian wavevector dependence with a correlation range that is much larger than in ordinary ferromagnets. The softening of the exciton mode is considerably smaller than predicted by mean field theory.Keywords
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