Magnetic structures of R2Fe2Si2C intermetallic compounds: Evolution to Er2Fe2Si2C and Tm2Fe2Si2C

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dc.contributor.authorSusilo, RAen_AU
dc.contributor.authorRocquefelte, Xen_AU
dc.contributor.authorCadogan, JMen_AU
dc.contributor.authorBruyer, Een_AU
dc.contributor.authorLafargue-Dit-Hauret, Wen_AU
dc.contributor.authorHutchison, WDen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorRyan, DHen_AU
dc.contributor.authorNamiki, Ten_AU
dc.contributor.authorCampbell, SJen_AU
dc.date.accessioned2021-07-16T05:08:56Zen_AU
dc.date.available2021-07-16T05:08:56Zen_AU
dc.date.issued2019-05-20en_AU
dc.date.statistics2021-07-12en_AU
dc.description.abstractThe magnetic structures of Er2Fe2Si2C and Tm2Fe2Si2C (monoclinic Dy2Fe2Si2C-type structure, C2/m space group) have been studied by neutron powder diffraction, complemented by magnetization, specific heat measurements, and 166Er Mössbauer spectroscopy, over the temperature range 0.5 to 300 K. Their magnetic structures are compared with those of other R2Fe2Si2C compounds. Antiferromagnetic ordering of the rare-earth sublattice is observed below the Néel temperatures of TN=4.8(2)K and TN=2.6(3)K for Er2Fe2Si2C and Tm2Fe2Si2C, respectively. While Er2Fe2Si2C and Tm2Fe2Si2C have the same crystal structure, they possess different magnetic structures compared with the other R2Fe2Si2C (R = Nd, Gd, Tb, Dy, and Ho) compounds. In particular, two different propagation vectors are observed below the Néel temperatures: k=[12,12,0] (for Er2Fe2Si2C) and k=[0.403(1),12,0] (for Tm2Fe2Si2C). For both compounds, the difference in propagation vectors is also accompanied by different orientations of the Er and Tm magnetic moments. Although the magnetic structures of Er2Fe2Si2C and Tm2Fe2Si2C differ from those of the other R2Fe2Si2C compounds, we have established that the two magnetic structures are closely related to each other. Our experimental and first-principles studies indicate that the evolution of the magnetic structures across the R2Fe2Si2C series is a consequence of the complex interplay between the indirect exchange interaction and crystal field effects. ©2019 American Physical Societyen_AU
dc.identifier.articlenumber184426en_AU
dc.identifier.citationSusilo, R. A., Rocquefelte, X., Cadogan, J. M., Bruyer, E., Lafargue-Dit-Hauret, W., Hutchison, W. D., Avdeev, M., Ryan, D. H., Namiki, T., & Campbell, S. J. (2019). Magnetic structures of R2Fe2Si2C intermetallic compounds: Evolution to Er2Fe2Si2C and Tm2Fe2Si2C. Physical Review B, 99(18), 184426. doi:10.1103/PhysRevB.99.184426en_AU
dc.identifier.issn2469-9969en_AU
dc.identifier.issue18en_AU
dc.identifier.journaltitlePhysical Review Ben_AU
dc.identifier.urihttps://doi.org/10.1103/PhysRevB.99.184426en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11089en_AU
dc.identifier.volume99en_AU
dc.language.isoenen_AU
dc.publisherAmerican Physical Societyen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectPhase transformationsen_AU
dc.subjectRare earthsen_AU
dc.subjectAlloysen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectPolycrystalsen_AU
dc.subjectSpecific heaten_AU
dc.titleMagnetic structures of R2Fe2Si2C intermetallic compounds: Evolution to Er2Fe2Si2C and Tm2Fe2Si2Cen_AU
dc.typeJournal Articleen_AU
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