2-k magnetic structure of a distorted kagome-lattice antiferromagnet Ho3Ru4Al12
R3Ru4Al12 (R is a rare-earth atom or uranium) crystallize in a hexagonal crystal structure where the R atoms form distorted kagome nets and are therefore subject to geometrical frustration. In the present project, we would like to study the Ho3Ru4Al12 compound. Ho3Ru4Al12 displays an antiferromagnetic ordering below the Neel temperature, TN = 4 K, with a possible incomplete ordering of the Ho magnetic moments. Our preliminary data collected using the Cyclops Instrument at the ILL indicate that the magnetic structure of Ho3Ru4Al12 may be described by two distinct propagation vectors. We would like to perform neutron-scattering experiments on a single crystal of Ho3Ru4Al12 in order to determine the magnetic structure of the compound. Among R3Ru4Al12, Ho3Ru4Al12 deserves special attention since (i) the Ho moments might be ordered incompletely, (ii) two propagation vectors seem to be necessary to describe its magnetic structure, and (iii) a second magnetic transition, possibly related to a pre-ordering of the magnetic moments, appears around 15 K. The proposed study is expected to contribute to the rich physics of geometrically frustrated compounds.
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GORBUNOV Denis; HENRIQUES Margarida; OULADDIAF Bachir and QURESHI Navid. (2018). 2-k magnetic structure of a distorted kagome-lattice antiferromagnet Ho3Ru4Al12. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-41-940
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