Neutron scattering study of the long-range ordered state in CeRu2Al10

Details Neutron scattering study of the long-range ordered state in CeRu2Al10 Neutron scattering study of the long-range ordered state in CeRu2Al10

2010-10-25

arxiv.org/abs/1010.5085v2

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 5 figures, International Conference on Heavy Electrons 2010 (Tokyo Metropolitan University, September 17 - 20, 2010),

Scientific paper

Elastic and inelastic neutron scattering measurements have been performed on powder and single-crystal samples of orthorhombic CeRu2Al10. The order forming below T0 = 27 K was identified as a long-range antiferromagnetic state with the wave vector k = (1,0,0). The magnetic spectral response in the ordered phase, measured on powder, is characterized by a spin gap and a pronounced peak at 8 meV, whose Q dependence suggests a magnetic origin. Both features are suppressed when temperature is raised to T0, and a conventional relaxational behavior is observed at 40 K. This peculiar spin dynamics is discussed in connection with recent magnetization results for the same compound.

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