A study of the antiferroquadrupolar ordering in HoB2C2 through inelastic neutron scattering

A. D. Hillier, P. Manuel, D. T. Adroja, R. I. Bewley, B. D. Rainford

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Inelastic neutron scattering measurements have been carried out to investigate the crystal field (CF) excitations of HoB2C2 and ErB2C2 in order to understand the mechanisms of the quadrupolar ordering (TQ) observed in HoB2C2 at 5 K. The well-defined low-energy excitations observed at 20 K undergo a dramatic broadening at TQ=5 K but the linewidths narrow again down to 2 K. In contrast, it is interesting to note that the high-energy response between 15 and 45 meV remains well defined on being cooled through both the antiferromagnetic (AFM) and quadrupolar ordering transitions. This underlines the importance of the quadrupolar fluctuations on the low-energy crystal field excitations. This is further supported by the absence of such low-energy excitations in the non-antiferroquadrupolar (AFQ) compound ErB2C2.

Original languageEnglish
Pages (from-to)757-759
Number of pages3
JournalJournal of Magnetism and Magnetic Materials
Volume310
Issue number2 SUPPL. PART 1
DOIs
Publication statusPublished - Mar 2007
Externally publishedYes

Keywords

  • Crystal field
  • ErBC
  • HoBC
  • Inelastic neutron scattering
  • Quadrupolar ordering

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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