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Publication Detail
Magnetic excitations in the ordered phases of praseodymium hexaboride
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Proceedings Paper
  • Authors:
    Le MD, McEwen KA, Park JG, Lee S, Iga F, Rule KC
  • Publisher:
    IOP PUBLISHING LTD
  • Publication date:
    12/03/2008
  • Journal:
    JOURNAL OF PHYSICS-CONDENSED MATTER
  • Volume:
    20
  • Issue:
    10
  • Country:
    Lund, SWEDEN
  • Print ISSN:
    0953-8984
  • Language:
    EN
  • Keywords:
    X-RAY-SCATTERING, CRYSTAL FIELDS, PRB6
  • Addresses:
    Le, MD
    UCL
    Dept Phys & Astron
    London
    WC1E 6BT
    England

    UCL
    London Ctr Nanotechnol
    London
    WC1E 6BT
    England

    Sungkyunkwan Univ
    Inst Basic Sci
    Suwon
    440746
    South Korea
Abstract
We have made the first inelastic neutron scattering measurements on single crystal PrB6, studying the magnetic excitations in the ordered phases. The lowest energy mode has a minimum energy of approximate to 1.0 meV at the magnetic zone centre, with a significant dispersion along the [001] direction, but very little dispersion along [110]. Interactions out to fourth nearest neighbours are required to explain the [001] dispersion. Measurements of the temperature dependence of the excitations show a strong softening and broadening of the lowest energy mode at the magnetic zone centre between 2 K (commensurate phase) and 5 K (incommensurate phase).
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