Title: Unexpected Phase Locking of Magnetic Fluctuations in the Multi-k Magnet USb
Authors: LIM J. A.BLACKBURN E.MAGNANI NicolaHIESS A.REGNAULT L.-P.CACIUFFO RobertoLANDER G.h.
Citation: PHYSICAL REVIEW B vol. 87 no. 6 p. 064421-1 - 064421 -5
Publisher: AMER PHYSICAL SOC
Publication Year: 2013
JRC N°: JRC79523
ISSN: 1098-0121
URI: http://prb.aps.org/abstract/PRB/v87/i6/e064421
http://publications.jrc.ec.europa.eu/repository/handle/JRC79523
DOI: 10.1103/PhysRevB.87.064421
Type: Articles in periodicals and books
Abstract: The spin waves in the multi-k antiferromagnet, USb, soften and become quasielastic well below the AFM ordering temperature TN. This occurs without a magnetic or structural transition. It has been suggested that this change is in fact due to de-phasing of the different multi-k components: a switch from 3-k to 1-k behavior. In this work, we use inelastic neutron scattering with tridirectional polarisation analysis to probe the quasielastic magnetic excitations and reveal that the 3-k structure does not de-phase. More surprisingly, the paramagnetic correlations also maintain the same clear phase correlations well above TN (up to at least 1:4 TN).
JRC Directorate:Nuclear Safety and Security

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