Polarization study of the excitation in the short range order of SrDy2O4 frustrated magnet
SrDy2O4 is part of the family of rare-earth frustrated magnets which are good candidates to study strongly correlated fluctuating ground states. The material does not have long range magnetic order down to 50 mK but 1D correlations are observed under 1.4K. A change of regime occurs under 0.7K, as seen in magnetic susceptibility, diffuse and inelastic neutron scattering. In particular, a non dispersive excitation emerges at 0.33 meV. The absence of dispersion and Ising nature of the system suggest that the excitation are domain walls in the 1D chains. The dynamics of these domain walls is crucial to understand the short range fluctuations responsible for the absence of long range order, like it is the case for the magnetic monopoles in spin ice. We therefore propose to determine the polarization of the 0.33 meV excitation in SrDy2O4 to describe its nature and explain the low temperature regime of this compound.
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GAUTHIER Nicolas; BIANCHI Andrea; KENZELMANN Michel and SCHMIDT Wolfgang F. (2016). Polarization study of the excitation in the short range order of SrDy2O4 frustrated magnet. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-05-656
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