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Persistent URL http://purl.org/net/epubs/work/66429
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Record Id 66429
Title Magnetic order in YbMn2Si2 - Neutron scattering investigation
Abstract Several mechanisms have been proposed to account for the structural and magnetic behaviour of the rare earth intermetallic compound YbMn2Si2 below the transition that occurs around ~30 K. We have carried out detailed neutron diffraction measurements over the temperature range ~0.3–52 K and confirm both an antiferromagnetic structure with ferromagnetic Mn (001) planes coupled antiferromagnetically along the c-axis above ?30 K and the absence of ordering of the Yb sublattice down to 0.3 K. The decrease in intensity of the (111) reflection around ~30 K together with the appearance of satellite reflections of propagation vector k=0012 k=0012 confirm that the magnetic unit cell doubles along the c axis below TN2. The resultant molecular field acting on half of the ions below ?30 K removes the degeneracy of the Kramers doublets of the Yb3+ ions and accounts for the additional excitations observed below ~30 K compared with the inelastic neutron scattering above ~30 K.
Organisation ISIS , ISIS-HET , STFC
Keywords ISIS 2013
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Language English (EN)
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Journal Article Journal of the Korean Physical Society 63, no. 3 (2013): 314-319. doi:10.3938/jkps.63.314 2013