Investigation of vibron states in a CeCuAl3 single crystal
CeCuAl3 crystallizes in the tetragonal BaNiSn3-type structure (space group I4mm, 107) and orders antiferromagnetically below Néel temperature of 2.7 K. CeCuAl3 shows interesting magnetic behavior which is generally discussed as a result of interplay between the magnetic RKKY and Kondo interactions and the influence of the low lying excited CEF state. Our recent investigation of magnetic structure led to the finding of propagation vector of (0.4, 0.4, 0) and magnetic moments arranged within the basal plane. CeCuAl3 belongs among a few cerium compounds where the strong CEF excitons-phonons coupling resulting in new quasi-bound states, vibrons, has been found. The aim of proposed experiment is to investigate the energy spectrum of single crystalline sample and follow dispersion relations of observed CEF-like and phonon-like peaks. The measurement will be performed on the same single crystal as all previous neutron scattering experiments. The low-energy part of spectra will be investigated by ThALES instrument (in frame of czech beam-time).
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KLICPERA Milan; BOEHM Martin; JAVORSKY Pavel and STEFFENS Paul. (2015). Investigation of vibron states in a CeCuAl3 single crystal. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1464
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