Phonon dispersion of bcc cerium

K. Nicolaus; J. Neuhaus; W. Petry; J. Bossy

doi:10.1007/s100510170178

Phonon dispersion of bcc cerium

K. Nicolaus, J. Neuhaus, W. Petry, J. Bossy

Department of Physics

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

9 Scopus citations

Abstract

The phonon dispersion of the high temperature bcc or δ-phase of cerium has been measured by inelastic neutron scattering, growing the single crystals in situ on the spectrometer. The phonon dispersion shows a characteristic valley of low energy and strongly damped phonons along T₁ [ξξ0] and T₁ [ξξ 2ξ]. From that the physical origin of the bcc-to-fcc martensitic phase transition is deduced. A mechanism involving long wavelength phonons is proposed.

Original language	English
Pages (from-to)	357-361
Number of pages	5
Journal	European Physical Journal B
Volume	21
Issue number	3
DOIs	https://doi.org/10.1007/s100510170178
State	Published - 1 Jun 2001

Keywords

63.20.Dj phonon states and bands, normal modes, and phonon dispersion
64.70.Kb solid-solid transitions
65.40.Gr entropy and other thermodynamical quantities

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10.1007/s100510170178

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abstract = "The phonon dispersion of the high temperature bcc or δ-phase of cerium has been measured by inelastic neutron scattering, growing the single crystals in situ on the spectrometer. The phonon dispersion shows a characteristic valley of low energy and strongly damped phonons along T1 [ξξ0] and T1 [ξξ 2ξ]. From that the physical origin of the bcc-to-fcc martensitic phase transition is deduced. A mechanism involving long wavelength phonons is proposed.",

keywords = "63.20.Dj phonon states and bands, normal modes, and phonon dispersion, 64.70.Kb solid-solid transitions, 65.40.Gr entropy and other thermodynamical quantities",

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T1 - Phonon dispersion of bcc cerium

AU - Nicolaus, K.

AU - Neuhaus, J.

AU - Petry, W.

AU - Bossy, J.

PY - 2001/6/1

Y1 - 2001/6/1

N2 - The phonon dispersion of the high temperature bcc or δ-phase of cerium has been measured by inelastic neutron scattering, growing the single crystals in situ on the spectrometer. The phonon dispersion shows a characteristic valley of low energy and strongly damped phonons along T1 [ξξ0] and T1 [ξξ 2ξ]. From that the physical origin of the bcc-to-fcc martensitic phase transition is deduced. A mechanism involving long wavelength phonons is proposed.

AB - The phonon dispersion of the high temperature bcc or δ-phase of cerium has been measured by inelastic neutron scattering, growing the single crystals in situ on the spectrometer. The phonon dispersion shows a characteristic valley of low energy and strongly damped phonons along T1 [ξξ0] and T1 [ξξ 2ξ]. From that the physical origin of the bcc-to-fcc martensitic phase transition is deduced. A mechanism involving long wavelength phonons is proposed.

KW - 63.20.Dj phonon states and bands, normal modes, and phonon dispersion

KW - 64.70.Kb solid-solid transitions

KW - 65.40.Gr entropy and other thermodynamical quantities

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DO - 10.1007/s100510170178

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SN - 1434-6028

VL - 21

SP - 357

EP - 361

JO - European Physical Journal B

JF - European Physical Journal B

IS - 3

ER -

Phonon dispersion of bcc cerium

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Keywords

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