Magnetic interplay of Mn and Yb sites in YbMn2Si2 – crystal field splitting

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dc.contributor.authorMole, RAen_AU
dc.contributor.authorCortie, DLen_AU
dc.contributor.authorHofmann, Men_AU
dc.contributor.authorWang, JLen_AU
dc.contributor.authorHutchison, WDen_AU
dc.contributor.authorYu, DHen_AU
dc.contributor.authorWang, XLen_AU
dc.contributor.authorCampbell, SJen_AU
dc.date.accessioned2024-12-13T00:11:31Zen_AU
dc.date.available2024-12-13T00:11:31Zen_AU
dc.date.issued2020-12-10en_AU
dc.date.statistics2024-04-03en_AU
dc.description.abstractThe crystal field splitting of YbMn2Si2 has been investigated over the temperature range 5–65 K using inelastic neutron scattering at a wavelength of 2.345 Å (resolution 800 μeV; dynamic range ∼10 meV). The excitation spectra have been analysed using a crystal field model above and below TN2, the temperature at which the collinear antiferromagnetic structure AFil transforms to the low-temperature structure in which the magnetic cell is doubled along the c-axis (TN1 = 526(4) K > T > TN2 = 32(2) K). The calculated excitation spectra show good agreement with the observed spectra for the unique environment of Yb3+ ions in the collinear antiferromagnetic structure AFil above TN2 and for the inequivalent sites of Yb3+ ions below TN2. This agreement has been obtained with a model for the low-temperature region in which a molecular field with optimal components in the x, y and z directions of Bx = 13.5 T, By = 65 T, Bz = 21.3 T is included. The pronounced components in the x and y directions are discussed in relation to the significant contraction of ∼0.1% of the c lattice parameter below the TN2 magnetic transition. © 2020 Published by Elsevier B.V.en_AU
dc.description.sponsorshipThe authors thank Dr A.V. Edge (UNSW Canberra) for preparing the YbMn2Si2 sample. All authors acknowledge ANSTO for the provision of beam-time and technical support at the OPAL Reactor and for the experimental support from staff at the Powder Diffraction beamline, the Australian Synchrotron. R.A.M acknowledges UNSW Canberra for a Conjoint Senior Lectureship; M.H. and J.L.W. acknowledge appointment as Senior Visiting Fellows at UNSW Canberra.en_AU
dc.identifier.articlenumber155316en_AU
dc.identifier.citationMole, R. A., Cortie, D. L., Hofmann, M., Wang, J., Hutchison, W. D., Yu, D., Wang, X., & Campbell, S. J. (2020). Magnetic interplay of Mn and Yb sites in YbMn2Si2 – crystal field splitting. Journal of Alloys and Compounds, 845, 155316. doi:10.1016/j.jallcom.2020.155316en_AU
dc.identifier.issn0925-8388en_AU
dc.identifier.journaltitleJournal of Alloys and Compoundsen_AU
dc.identifier.urihttps://doi.org/10.1016/j.jallcom.2020.155316en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15824en_AU
dc.identifier.volume845en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectCrystal fielden_AU
dc.subjectManganeseen_AU
dc.subjectYtterbiumen_AU
dc.subjectSiliconen_AU
dc.subjectMagnetic fieldsen_AU
dc.subjectTemperature rangeen_AU
dc.subjectInelastic scatteringen_AU
dc.subjectRare earthsen_AU
dc.subjectCrystalsen_AU
dc.subjectLigandsen_AU
dc.titleMagnetic interplay of Mn and Yb sites in YbMn2Si2 – crystal field splittingen_AU
dc.typeJournal Articleen_AU
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