No role for phonon entropy in the (formula presented) volume collapse transition in (formula presented) at ambient pressure

T. Swan-Wood; W. L. Hults; R. Osborn; J. C. Cooley; J. C. Lashley; J. L. Smith; R. J. McQueeney; M. E. Manley; O. Delaire; B. Fultz; E. A. Goremychkin

doi:10.1103/PhysRevB.67.014103

No role for phonon entropy in the (formula presented) volume collapse transition in (formula presented) at ambient pressure

T. Swan-Wood, W. L. Hults, R. Osborn, J. C. Cooley, J. C. Lashley, J. L. Smith, R. J. McQueeney, M. E. Manley, O. Delaire, B. Fultz, E. A. Goremychkin

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

Abstract

Phonon densities of states (DOS) were obtained from inelastic neutron scattering measurements on (formula presented) at temperatures from 10 to 300 K. The α phase showed a significant softening of its phonon DOS when heated from 10 to 140 K. Despite the 17% volume collapse, the phonon DOS showed little change between the γ phase at 150 K and the α phase at 140 K. This is supported by analysis of the magnetic spectra showing that most of the transition entropy can be accounted for with the crystal field and changes in the ground-state spin fluctuations. We argue that the anomalous behavior of the phonon DOS originates with the volume dependence of the ground-state spin fluctuations.

Original language	English
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	67
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.67.014103
State	Published - 2003
Externally published	Yes

Access to Document

10.1103/PhysRevB.67.014103

Cite this

Swan-Wood, T., Hults, W. L., Osborn, R., Cooley, J. C., Lashley, J. C., Smith, J. L., McQueeney, R. J., Manley, M. E., Delaire, O., Fultz, B., & Goremychkin, E. A. (2003). No role for phonon entropy in the (formula presented) volume collapse transition in (formula presented) at ambient pressure. Physical Review B - Condensed Matter and Materials Physics, 67(1). https://doi.org/10.1103/PhysRevB.67.014103

@article{f0f3a85256634e249a795d7fa00d7798,

title = "No role for phonon entropy in the (formula presented) volume collapse transition in (formula presented) at ambient pressure",

abstract = "Phonon densities of states (DOS) were obtained from inelastic neutron scattering measurements on (formula presented) at temperatures from 10 to 300 K. The α phase showed a significant softening of its phonon DOS when heated from 10 to 140 K. Despite the 17% volume collapse, the phonon DOS showed little change between the γ phase at 150 K and the α phase at 140 K. This is supported by analysis of the magnetic spectra showing that most of the transition entropy can be accounted for with the crystal field and changes in the ground-state spin fluctuations. We argue that the anomalous behavior of the phonon DOS originates with the volume dependence of the ground-state spin fluctuations.",

author = "T. Swan-Wood and Hults, {W. L.} and R. Osborn and Cooley, {J. C.} and Lashley, {J. C.} and Smith, {J. L.} and McQueeney, {R. J.} and Manley, {M. E.} and O. Delaire and B. Fultz and Goremychkin, {E. A.}",

year = "2003",

doi = "10.1103/PhysRevB.67.014103",

language = "English",

volume = "67",

journal = "Physical Review B - Condensed Matter and Materials Physics",

issn = "1098-0121",

publisher = "American Physical Society",

number = "1",

}

Swan-Wood, T, Hults, WL, Osborn, R, Cooley, JC, Lashley, JC, Smith, JL, McQueeney, RJ, Manley, ME, Delaire, O, Fultz, B & Goremychkin, EA 2003, 'No role for phonon entropy in the (formula presented) volume collapse transition in (formula presented) at ambient pressure', Physical Review B - Condensed Matter and Materials Physics, vol. 67, no. 1. https://doi.org/10.1103/PhysRevB.67.014103

TY - JOUR

T1 - No role for phonon entropy in the (formula presented) volume collapse transition in (formula presented) at ambient pressure

AU - Swan-Wood, T.

AU - Hults, W. L.

AU - Osborn, R.

AU - Cooley, J. C.

AU - Lashley, J. C.

AU - Smith, J. L.

AU - McQueeney, R. J.

AU - Manley, M. E.

AU - Delaire, O.

AU - Fultz, B.

AU - Goremychkin, E. A.

PY - 2003

Y1 - 2003

N2 - Phonon densities of states (DOS) were obtained from inelastic neutron scattering measurements on (formula presented) at temperatures from 10 to 300 K. The α phase showed a significant softening of its phonon DOS when heated from 10 to 140 K. Despite the 17% volume collapse, the phonon DOS showed little change between the γ phase at 150 K and the α phase at 140 K. This is supported by analysis of the magnetic spectra showing that most of the transition entropy can be accounted for with the crystal field and changes in the ground-state spin fluctuations. We argue that the anomalous behavior of the phonon DOS originates with the volume dependence of the ground-state spin fluctuations.

AB - Phonon densities of states (DOS) were obtained from inelastic neutron scattering measurements on (formula presented) at temperatures from 10 to 300 K. The α phase showed a significant softening of its phonon DOS when heated from 10 to 140 K. Despite the 17% volume collapse, the phonon DOS showed little change between the γ phase at 150 K and the α phase at 140 K. This is supported by analysis of the magnetic spectra showing that most of the transition entropy can be accounted for with the crystal field and changes in the ground-state spin fluctuations. We argue that the anomalous behavior of the phonon DOS originates with the volume dependence of the ground-state spin fluctuations.

UR - http://www.scopus.com/inward/record.url?scp=85038302170&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.67.014103

DO - 10.1103/PhysRevB.67.014103

M3 - Article

AN - SCOPUS:85038302170

SN - 1098-0121

VL - 67

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 1

ER -

No role for phonon entropy in the (formula presented) volume collapse transition in (formula presented) at ambient pressure

Abstract

Access to Document

Other files and links

Fingerprint

Cite this