Collective magnetic excitations in mixed-valence Sm0.83Y0.17S

P. A. Alekseev, J. M. Mignot, A. Ochiai, E. V. Nefeodova, I. P. Sadikov, E. S. Clementyev, V. N. Lazukov, Markus Braden, K. S. Nemkovski

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15 Citations (Scopus)

Abstract

The magnetic spectral response of black-phase mixed-valence SM0.83Y0.17S has been measured by inelastic neutron scattering on a single crystal. Two magnetic peaks are observed in the energy range of the Sm2+ spin-orbit transition (25-40 meV). Both of them exhibit significant dispersion along the three main symmetry directions, reminiscent of the spin-orbit exciton branch found in pure divalent SmS. The results can be reproduced by a simple phenomenological model taking into account the existence of sizable Sm-Sm exchange interactions, and a microscopic mechanism is proposed on the basis of the "local-bound-state" theory developed previously for SmB6.

Original languageEnglish
Article number153201
Pages (from-to)1532011-1532014
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number15
Publication statusPublished - 2002 Apr 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    Alekseev, P. A., Mignot, J. M., Ochiai, A., Nefeodova, E. V., Sadikov, I. P., Clementyev, E. S., Lazukov, V. N., Braden, M., & Nemkovski, K. S. (2002). Collective magnetic excitations in mixed-valence Sm0.83Y0.17S. Physical Review B - Condensed Matter and Materials Physics, 65(15), 1532011-1532014. [153201].