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Journal article

Observation of a Central Mode in an Exchange-Coupled Singlet-Ground State System

By Als-Nielsen, Jens Aage1; Kjems, Jørgen1; Buyers, W. J. L.; Birgenau, R. J.

From

Risø National Laboratory for Sustainable Energy, Technical University of Denmark1

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.

Language: English
Year: 1977
Pages: 2673-2678
ISSN: 17473802 and 00223719
Types: Journal article
DOI: 10.1088/0022-3719/10/14/019

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