Determination of the crystal field levels in TmV2Al20

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dc.contributor.authorWhite, Ren_AU
dc.contributor.authorHutchison, WDen_AU
dc.contributor.authorIles, GNen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorCadogan, JMen_AU
dc.contributor.authorNamiki, Ten_AU
dc.contributor.authorNishimura, K.en_AU
dc.date.accessioned2021-08-24T20:53:24Zen_AU
dc.date.available2021-08-24T20:53:24Zen_AU
dc.date.issued2017-07-12en_AU
dc.date.statistics2021-08-16en_AU
dc.description.abstractSo called caged rare earth compounds of the RM Al20-type (R = lanthanide, M = transition metal) exhibit interesting physical and magnetic properties at low temperatures. For example PrV Al20 and PrTi Al20 show a quadrupolar Kondo effect [1] and superconductivity [2] brought about by the non-magnetic ground state and the cubic symmetry of the Pr3+site. In this work the compound TmV Al20, a hole analogue of PrV Al20 has been investigated. Previous crystal field calculations based on specific heat and magnetisation [3] resulted in parameters of W = 0.5 K and x = -0.6 within the Lea, Leask and Wolf formalism [4]. However to match the experimental zero field specific heat near 0.5 K, an artificial broadening of the ground state was applied. To validate and clarify these results, we have carried out an inelastic neutron scattering experiment on the PELICAN time-of-flight spectrometer to determine the energy splitting between the crystal field levels. This has allowed a further refinement of the crystal field parameters to W = 0.42(1) K and x = -0.63(1). The very broad Lorentzian line shapes suggest strong 4f-conduction band electron coupling.en_AU
dc.identifier.citationWhite, R., Hutchison, W., Iles, G., Mole, R., Cadogan, S., Namiki, T., & Nishimura, K. (2017). Determination of the crystal field levels in TmV2Al20. Paper presented at ICNS 2017 (International Conference on Neutron Scattering), Daejeon, South Korea, 9 to 13 July 2017. Retrieved from: http://www.icns2017.org/program.phpen_AU
dc.identifier.conferenceenddate13 July 2017en_AU
dc.identifier.conferencenameICNS 2017 (International Conference on Neutron Scattering)en_AU
dc.identifier.conferenceplaceDaejeon, South Koreaen_AU
dc.identifier.conferencestartdate9 July 2017en_AU
dc.identifier.urihttp://www.icns2017.org/program.phpen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11455en_AU
dc.language.isoenen_AU
dc.publisherInternational Conference on Neutron Scatteringen_AU
dc.subjectRare earth compoundsen_AU
dc.subjectTransition elementsen_AU
dc.subjectMagnetic propertiesen_AU
dc.subjectSuperconductivityen_AU
dc.subjectGround statesen_AU
dc.subjectNeutron diffractionen_AU
dc.titleDetermination of the crystal field levels in TmV2Al20en_AU
dc.typeConference Abstracten_AU
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