Phonon densities of states of γ-cerium and δ-cerium measured by inelastic neutron scattering

J. L. Robertson; H. N. Frase; P. D. Bogdanoff; M. E. Manley; B. Fultz; R. J. McQueeney

doi:10.1080/095008399177372

Phonon densities of states of γ-cerium and δ-cerium measured by inelastic neutron scattering

J. L. Robertson, H. N. Frase, P. D. Bogdanoff, M. E. Manley, B. Fultz, R. J. McQueeney

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13 Scopus citations

Abstract

Inelastic neutron scattering spectra were measured on Ce metal at temperatures near the fcc (γ) to bcc (δ) transition, and phonon DOS curves were obtained. A large difference in the phonon DOS of γ-Ce and δ-Ce was found, and this difference accounts for a change in vibrational entropy of (0.51±0.05)/cb atom^-1at the γ-δ transition. To be consistent with the latent heat of the γ-δ transition, this large change in vibrational entropy should be accompanied by a thermodynamically-signihcant change in electronic entropy of the opposite sign.

Original language	English
Pages (from-to)	297-304
Number of pages	8
Journal	Philosophical Magazine Letters
Volume	79
Issue number	5
DOIs	https://doi.org/10.1080/095008399177372
State	Published - May 1999
Externally published	Yes

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title = "Phonon densities of states of γ-cerium and δ-cerium measured by inelastic neutron scattering",

abstract = "Inelastic neutron scattering spectra were measured on Ce metal at temperatures near the fcc (γ) to bcc (δ) transition, and phonon DOS curves were obtained. A large difference in the phonon DOS of γ-Ce and δ-Ce was found, and this difference accounts for a change in vibrational entropy of (0.51±0.05)/cb atom-1at the γ-δ transition. To be consistent with the latent heat of the γ-δ transition, this large change in vibrational entropy should be accompanied by a thermodynamically-signihcant change in electronic entropy of the opposite sign.",

author = "Robertson, {J. L.} and Frase, {H. N.} and Bogdanoff, {P. D.} and Manley, {M. E.} and B. Fultz and McQueeney, {R. J.}",

year = "1999",

month = may,

doi = "10.1080/095008399177372",

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volume = "79",

pages = "297--304",

journal = "Philosophical Magazine Letters",

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T1 - Phonon densities of states of γ-cerium and δ-cerium measured by inelastic neutron scattering

AU - Robertson, J. L.

AU - Frase, H. N.

AU - Bogdanoff, P. D.

AU - Manley, M. E.

AU - Fultz, B.

AU - McQueeney, R. J.

PY - 1999/5

Y1 - 1999/5

N2 - Inelastic neutron scattering spectra were measured on Ce metal at temperatures near the fcc (γ) to bcc (δ) transition, and phonon DOS curves were obtained. A large difference in the phonon DOS of γ-Ce and δ-Ce was found, and this difference accounts for a change in vibrational entropy of (0.51±0.05)/cb atom-1at the γ-δ transition. To be consistent with the latent heat of the γ-δ transition, this large change in vibrational entropy should be accompanied by a thermodynamically-signihcant change in electronic entropy of the opposite sign.

AB - Inelastic neutron scattering spectra were measured on Ce metal at temperatures near the fcc (γ) to bcc (δ) transition, and phonon DOS curves were obtained. A large difference in the phonon DOS of γ-Ce and δ-Ce was found, and this difference accounts for a change in vibrational entropy of (0.51±0.05)/cb atom-1at the γ-δ transition. To be consistent with the latent heat of the γ-δ transition, this large change in vibrational entropy should be accompanied by a thermodynamically-signihcant change in electronic entropy of the opposite sign.

UR - http://www.scopus.com/inward/record.url?scp=0032623435&partnerID=8YFLogxK

U2 - 10.1080/095008399177372

DO - 10.1080/095008399177372

M3 - Article

AN - SCOPUS:0032623435

SN - 0950-0839

VL - 79

SP - 297

EP - 304

JO - Philosophical Magazine Letters

JF - Philosophical Magazine Letters

IS - 5

ER -

Phonon densities of states of γ-cerium and δ-cerium measured by inelastic neutron scattering

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