Phonon anomalies in the intermediate-valence compound Ce0.9Pr0.1Ni5

W. Bührer; P. A. Alekseev; V. N. Lazukov; K. A. Kikoin; A. S. Mishchenko; I. P. Sadikov; R. Hempelmann

doi:10.1016/0038-1098(95)00092-5

Phonon anomalies in the intermediate-valence compound Ce_0.9Pr_0.1Ni₅

W. Bührer, P. A. Alekseev, V. N. Lazukov, K. A. Kikoin, A. S. Mishchenko, I. P. Sadikov, R. Hempelmann

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

5 Scopus citations

Abstract

The phonon dispersion curves of the intermediate valence alloy Ce_0.9Pr_0.1Ni₅ and the integral valence reference alloys LaNi₅ and PrNi₅ have been investigated by coherent inelastic neutron scattering on a triple-axis spectrometer. The lowest zone-center optic mode in Ce_0.9Pr_0.1Ni₅ is distinctly softer than in the reference alloys. Despite the smaller lattice volume of the Ce-based alloy there is no hardening of acoustic and optic phonon branches with respect to the reference systems. The observed effects are interpreted as features of the f-d-hybridisation due to the intermediate valence state of the cerium ion.

Original language	English
Pages (from-to)	329-334
Number of pages	6
Journal	Solid State Communications
Volume	94
Issue number	5
DOIs	https://doi.org/10.1016/0038-1098(95)00092-5
State	Published - 1 Jan 1995
Externally published	Yes

Keywords

A. metals
D. phonons
D. valence fluctuations
E. neutron scattering

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1016/0038-1098(95)00092-5

Cite this

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title = "Phonon anomalies in the intermediate-valence compound Ce0.9Pr0.1Ni5",

abstract = "The phonon dispersion curves of the intermediate valence alloy Ce0.9Pr0.1Ni5 and the integral valence reference alloys LaNi5 and PrNi5 have been investigated by coherent inelastic neutron scattering on a triple-axis spectrometer. The lowest zone-center optic mode in Ce0.9Pr0.1Ni5 is distinctly softer than in the reference alloys. Despite the smaller lattice volume of the Ce-based alloy there is no hardening of acoustic and optic phonon branches with respect to the reference systems. The observed effects are interpreted as features of the f-d-hybridisation due to the intermediate valence state of the cerium ion.",

keywords = "A. metals, D. phonons, D. valence fluctuations, E. neutron scattering",

author = "W. B{\"u}hrer and Alekseev, {P. A.} and Lazukov, {V. N.} and Kikoin, {K. A.} and Mishchenko, {A. S.} and Sadikov, {I. P.} and R. Hempelmann",

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TY - JOUR

T1 - Phonon anomalies in the intermediate-valence compound Ce0.9Pr0.1Ni5

AU - Bührer, W.

AU - Alekseev, P. A.

AU - Lazukov, V. N.

AU - Kikoin, K. A.

AU - Mishchenko, A. S.

AU - Sadikov, I. P.

AU - Hempelmann, R.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - The phonon dispersion curves of the intermediate valence alloy Ce0.9Pr0.1Ni5 and the integral valence reference alloys LaNi5 and PrNi5 have been investigated by coherent inelastic neutron scattering on a triple-axis spectrometer. The lowest zone-center optic mode in Ce0.9Pr0.1Ni5 is distinctly softer than in the reference alloys. Despite the smaller lattice volume of the Ce-based alloy there is no hardening of acoustic and optic phonon branches with respect to the reference systems. The observed effects are interpreted as features of the f-d-hybridisation due to the intermediate valence state of the cerium ion.

AB - The phonon dispersion curves of the intermediate valence alloy Ce0.9Pr0.1Ni5 and the integral valence reference alloys LaNi5 and PrNi5 have been investigated by coherent inelastic neutron scattering on a triple-axis spectrometer. The lowest zone-center optic mode in Ce0.9Pr0.1Ni5 is distinctly softer than in the reference alloys. Despite the smaller lattice volume of the Ce-based alloy there is no hardening of acoustic and optic phonon branches with respect to the reference systems. The observed effects are interpreted as features of the f-d-hybridisation due to the intermediate valence state of the cerium ion.

KW - A. metals

KW - D. phonons

KW - D. valence fluctuations

KW - E. neutron scattering

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DO - 10.1016/0038-1098(95)00092-5

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