Origin of diffuse signal in UIrSi3
RTX3 compounds crystallizing in the non-centrosymmetric BaNiSn3-type structure reveal frequently diverse and exotic physical properties. UIrSi3 is one of the only two UTX3 isostructural analogs. Contrary to rare-earth-based compounds with localized 4f electrons, the physical properties of UTX3 origin in the 5f-electron wave functions losing, to an extent, their atomic character due to mutual overlap between neighboring U ions and hybridization of 5f states with valence-electron states of ligands. A complex magnetic phase diagram and most probably a complex magnetic structure make UIrSi3 a prominent system for detailed microscopic investigations. Besides intensive investigations of macroscopic properties, we performed neutron diffraction experiments on CYCLOPS and D10. Our recent data strongly suggest the presence of rather anisotropic diffuse scattering signal beneath the nuclear reflections. The origin of diffuse signal might be found in local atomic defects of ordered lattice, which seem to cause partial anisotropic magnetic disorder at low temperatures.Proposed experiment on D7 aims to investigate the observed diffuse signal in detail – to separate its individual contributions.
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VALENTA Jaroslav; CERMAK Petr; Fuminori HONDA; KLICPERA Milan; PRCHAL Jiri; VALISKA Michal and WILDES Andrew. (2019). Origin of diffuse signal in UIrSi3. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-32-867
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