Crystal electric field excitations in the quasicrystal approximant TbCd6 studied by inelastic neutron scattering

Pinaki Das, P. F. Lory, R. Flint, T. Kong, T. Hiroto, S. L. Bud'Ko, P. C. Canfield, M. De Boissieu, A. Kreyssig, A. I. Goldman

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

We have performed inelastic neutron scattering measurements on powder samples of the quasicrystal approximant, TbCd6, grown using isotopically enriched Cd112. Both quasielastic scattering and distinct inelastic excitations were observed below 3 meV. The intensity of the quasielastic scattering measured in the paramagnetic phase diverges as TN∼22 K is approached from above. The inelastic excitations, and their evolution with temperature, are well characterized by the leading term, B20O20, of the crystal electric field (CEF) level scheme for local pentagonal symmetry for the rare-earth ions [S. Jazbec, Phys. Rev. B 93, 054208 (2016)2469-995010.1103/PhysRevB.93.054208] indicating that the Tb moment is directed primarily along the unique local pseudofivefold axis of the Tsai-type clusters. We also find good agreement between the inverse susceptibility determined from magnetization measurements using a magnetically diluted Tb0.05Y0.95Cd6 sample and that calculated using the CEF level scheme determined from the neutron measurements.

Original languageEnglish (US)
Article number054408
JournalPhysical Review B
Volume95
Issue number5
DOIs
StatePublished - Feb 7 2017
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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