Magnetic ordering in Er2Fe2Si2C and Tm2Fe2Si2C

dc.contributor.authorSusilo, RAen_AU
dc.contributor.authorCadogan, JMen_AU
dc.contributor.authorHutchison, WDen_AU
dc.contributor.authorCampbell, SJen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorRyan, DHen_AU
dc.contributor.authorNamiki, Ten_AU
dc.description.abstractThe magnetic ordering of two members of the R2Fe2Si2C (R = rare-earth) series of compounds (monoclinic Dy2Fe2Si2C-type structure with the C2/m space group), Er2Fe2Si2C and Tm2Fe2Si2C, have been studied by neutron powder diffraction and 166Er Mössbauer spectroscopy, complemented by magnetisation and specific heat measurements. In both cases, antiferromagnetic ordering of the R sublattice is observed, with Neel temperatures of 4.8(2) K and 2.6(3) K for Er2Fe2Si2C and Tm2Fe2Si2C, respectively. The magnetic structures of the Erand Tm-based compounds are quite different from those found for the other members of the R2Fe2Si2C series. Previous studies show that the common magnetic structure of the heavy- R2Fe2Si2C compounds involves ordering of the R sublattice along the b-axis with a propagation vector k = [0, 0, ½]. However, the antiferromagnetic structure of the Er sublattice in Er2Fe2Si2C is described by k = [½, ½, 0] with the Er magnetic moments lying close to the ac-plane. Tm2Fe2Si2C is found to exhibit a more complex magnetic structure that is characterised by a square-wave modulation of the Tm magnetic moments along the a-axis and a cell-doubling along the b-axis with k = [0.403(1), ½, 0]. The differences in the magnetic structures of these compounds are interpreted in terms of the RKKY exchange interaction, which depends on the R-R interatomic distances, and crystal field effects acting on the R3+ ions.en_AU
dc.identifier.citationSusilo, R. A., Cadogan, J. M., Hutchison, W. D., Campbell, S. J., Avdeev, M., Ryan, D. H., & Namiki, T. (2015). Magnetic ordering in Er2Fe2Si2C and Tm2Fe2Si2C. Paper presented at 39th Annual Condensed Matter and Materials Meeting, Charles Sturt University, Wagga Wagga, NSW, 3 – 6 February 2015. Retrieved from:
dc.identifier.conferenceenddate6 February 2015en_AU
dc.identifier.conferencename39th Annual Condensed Matter and Materials Meetingen_AU
dc.identifier.conferenceplaceWagga Wagga, NSWen_AU
dc.identifier.conferencestartdate3 February 2015en_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectThulium compoundsen_AU
dc.subjectCrystal fielden_AU
dc.subjectErbium compoundsen_AU
dc.subjectExchange interactionsen_AU
dc.subjectMagnetic momentsen_AU
dc.subjectMagnetic propertiesen_AU
dc.subjectMoessbauer effecten_AU
dc.subjectNeel temperatureen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectRare earthsen_AU
dc.titleMagnetic ordering in Er2Fe2Si2C and Tm2Fe2Si2Cen_AU
dc.typeConference Abstracten_AU
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
38.6 MB
Adobe Portable Document Format
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
1.63 KB
Item-specific license agreed upon to submission