Crystal field excitations of YbMn2Si2

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dc.contributor.authorMole, RAen_AU
dc.contributor.authorHofmann, Men_AU
dc.contributor.authorAdroja, DTen_AU
dc.contributor.authorMoze, Oen_AU
dc.contributor.authorCampbell, SJen_AU
dc.date.accessioned2014-04-24T05:18:14Zen_AU
dc.date.available2014-04-24T05:18:14Zen_AU
dc.date.issued2013-12-01en_AU
dc.date.statistics2014-04-24en_AU
dc.description.abstractThe crystal field excitations of the rare earth intermetallic compound YbMn2Si2 have been measured by inelastic neutron scattering over the temperature range 2.5-50 K. The YbMn2Si2 spectra exhibit three low energy excitations (similar to 3-7 meV) in the antiferromagnetic AFil region above the magnetic phase transition at T-N2 = 30(5) K. The crystal field parameters have been determined for YbMn2Si2 in the antiferromagnetic AFil region. A further two inelastic excitations (similar to 9 meV, 17 meV) are observed below T-N2=30(5) K, the temperature at which the high temperature antiferromagnetic structure is reported to exhibit doubling of the magnetic cell. Energy level diagrams have been determined for Yb3+ ions in the different sites above (single site) and below the magnetic transition temperature (two sites). The excitation energies for both sites are shown to be temperature independent with the temperature dependences of the transition intensities for the two sites described well by a simple Boltzmann model. The spectra below T-N2 cannot be described fully in terms of molecular field models based on either a single Yb3+ site or two Yb3+ sites. This indicates that the magnetic behaviour of YbMn(2)Si2 is more complicated than previously considered. The inability to account fully for excitations below the magnetic phase transition may be due to an, as yet, unresolved structural transition associated with the magnetic transition. © 2013, Elsevier Ltd.en_AU
dc.identifier.citationMole, R. A., Hofmann, M., Adroja, D. T., Moze, O., & Campbell, S. J. (2013). Crystal field excitations of YbMn2Si2. Journal of Magnetism and Magnetic Materials, 347, 86-94. doi:10.1016/j.jmmm.2013.07.038en_AU
dc.identifier.govdoc5422en_AU
dc.identifier.issn0304-8853en_AU
dc.identifier.journaltitleJournal of Magnetism and Magnetic Materialsen_AU
dc.identifier.pagination86-94en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.jmmm.2013.07.038en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/5486en_AU
dc.identifier.volume347en_AU
dc.language.isoenen_AU
dc.publisherElsevier Science BVen_AU
dc.subjectNeutronsen_AU
dc.subjectMagnetismen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectCrystalsen_AU
dc.subjectCrystal fielden_AU
dc.titleCrystal field excitations of YbMn2Si2en_AU
dc.typeJournal Articleen_AU
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