Magnetic excitations in ErB2
ErB2 is a member of the class of hexagonal C32 rare-earth and transition-metal diborides - a series of materials comprising of the conventional high-temperature superconductor MgB2, as well as the itinerant-electron antiferromagnet CrB2. Our comprehensive measurements of the magnetisation, ac-susceptibility, specific heat and electrical transport properties reveal a transition to a magnetically ordered state at Tc=14K. Our recent single-crystal neutron diffraction measurements showed that below Tc ErB2 is a soft ferromagnet, an unexpected type of ordering given the unusual Hall resistivity, reminescent of exotic, topological kind of magnetic order. We want to investigate magnon dispersion relations in ErB2 as we expect that an unusual Hall resistivity might find a correspondence in unusual magnon dispersions. We request 4 days of beamtime at IN12 equipped with an orangey cryostat. We will mount the sample with the hexagonal (hk0) scattering plane and measure magnon dispersion within the Brillouin zone with strong (100) magnetic reflection. ErB2 has one magnetic atom in unit cell and we expect just on magnon branch with energy in the range of kBTc-1.2 meV.
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The recommended format for citing this dataset in a research publication is in the following format:
STEKIEL Michal; PFLEIDERER Christian; RESCH Christoph; SCHMALZL Karin; Astrid Schneidewind; SIMETH Wolfgang and TEIXEIRA PARENTE Mario. (2023). Magnetic excitations in ErB2. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.CRG-2918
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