Spin-reorientation in quaternary Dy_2Fe_2Si_2C

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dc.contributor.authorSusilo, RAen_AU
dc.contributor.authorCadogan, JMen_AU
dc.contributor.authorHutchison, WDen_AU
dc.contributor.authorStewart, GAen_AU
dc.contributor.authorCampbell, SJen_AU
dc.contributor.authorAvdeev, Men_AU
dc.date.accessioned2021-07-29T22:50:50Zen_AU
dc.date.available2021-07-29T22:50:50Zen_AU
dc.date.issued2016-11-30en_AU
dc.date.statistics2021-07-19en_AU
dc.description.abstractThe low temperature magnetic properties of Dy_2Fe_2Si_2C have been investigated by magnetisation, specific heat, neutron powder diffraction and "5"7Fe Mössbauer spectroscopy measurements. In contrast to other R_2Fe_2Si_2C compounds, we found that Dy_2Fe_2Si_2C undergoes two successive magnetic transitions at low temperatures. The first magnetic transition at T_N = 26(2) K is associated with the transition from paramagnetic to antiferromagnetic states, whereas our neutron diffraction and "5"7Fe Mössbauer spectroscopy studies reveal that the second magnetic transition at T_t = 6(2) K is likely related to a spin-reorientation of the Dy moments rather than the independent ordering of the Fe sublattice. The magnetic structure above T_t can be described with a propagation vector k = [0 0 1/2] with the ordering of the Dy magnetic moments along the monoclinic b-axis, whereas on cooling below T_t the Dy moment tips away from the b-axis towards the ac-plane. Magnetocrystalline anisotropy energy calculations show that a canted magnetic structure is more energetically favourable below T_t than b-axis order due to the important influence of higher-order crystal field terms at low temperatures, thus explaining the unique occurrence of spin reorientation in Dy_2Fe_2Si_2C compared with other R_2Fe_2Si_2C compounds.en_AU
dc.identifier.citationSusilo, R. A., Cadogan, J. M., Hutchison, W. D., Stewart, G. A., Campbell, S. J., & Avdeev, M. (2016). Spin-reorientation in quaternary Dy_2Fe_2Si_2C. Paper presented at 13th AINSE-ANBUG Neutron Scattering Symposium (AANSS 2016); Sydney, NSW, Australia, 29-30 November 2016.en_AU
dc.identifier.conferenceenddate30 November 2016en_AU
dc.identifier.conferencename13th AINSE-ANBUG Neutron Scattering Symposiumen_AU
dc.identifier.conferenceplaceSydney, NSW, Australiaen_AU
dc.identifier.conferencestartdate29 November 2016en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11154en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Nuclear Science and Engineeringen_AU
dc.subjectAnisotropyen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectCrystal fielden_AU
dc.subjectCrystal latticesen_AU
dc.subjectElectron temperatureen_AU
dc.subjectMagnetic propertiesen_AU
dc.subjectMoessbauer effecten_AU
dc.subjectNeutron diffractionen_AU
dc.subjectParamagnetismen_AU
dc.subjectSpin orientationen_AU
dc.subjectTemperature dependenceen_AU
dc.titleSpin-reorientation in quaternary Dy_2Fe_2Si_2Cen_AU
dc.typeConference Abstracten_AU
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