Collective magnetic excitations in mixed-valence (formula presented)

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

doi:10.1103/PhysRevB.65.153201

Collective magnetic excitations in mixed-valence (formula presented)

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

SCI - Physics

Research output: Contribution to journal › Article › peer-review

Abstract

The magnetic spectral response of black-phase mixed-valence (formula presented) has been measured by inelastic neutron scattering on a single crystal. Two magnetic peaks are observed in the energy range of the (formula presented) 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 (formula presented).

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	65
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevB.65.153201
Publication status	Published - 2002

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Collective magnetic excitations in mixed-valence (formula presented). / 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.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 65, No. 15, 2002, p. 1-4.

Research output: Contribution to journal › Article › peer-review

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title = "Collective magnetic excitations in mixed-valence (formula presented)",

abstract = "The magnetic spectral response of black-phase mixed-valence (formula presented) has been measured by inelastic neutron scattering on a single crystal. Two magnetic peaks are observed in the energy range of the (formula presented) 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 (formula presented).",

author = "Alekseev, {P. A.} and Mignot, {J. M.} and A. Ochiai and Nefeodova, {E. V.} and Sadikov, {I. P.} and Clementyev, {E. S.} and Lazukov, {V. N.} and M. Braden and Nemkovski, {K. S.}",

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AU - Alekseev, P. A.

AU - Mignot, J. M.

AU - Ochiai, A.

AU - Nefeodova, E. V.

AU - Sadikov, I. P.

AU - Clementyev, E. S.

AU - Lazukov, V. N.

AU - Braden, M.

AU - Nemkovski, K. S.

PY - 2002

Y1 - 2002

N2 - The magnetic spectral response of black-phase mixed-valence (formula presented) has been measured by inelastic neutron scattering on a single crystal. Two magnetic peaks are observed in the energy range of the (formula presented) 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 (formula presented).

AB - The magnetic spectral response of black-phase mixed-valence (formula presented) has been measured by inelastic neutron scattering on a single crystal. Two magnetic peaks are observed in the energy range of the (formula presented) 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 (formula presented).

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