High-resolution phonon energy shift measurements with the inelastic neutron spin echo technique

Fankang Li; Jiazhou Shen; Steven R. Parnell; Alex N. Thaler; Masaaki Matsuda; Thomas Keller; Olivier Delaire; Roger Pynn; Jaime A. Fernandez-Baca

doi:10.1107/S1600576719008008

High-resolution phonon energy shift measurements with the inelastic neutron spin echo technique

Fankang Li^*, Jiazhou Shen, Steven R. Parnell, Alex N. Thaler, Masaaki Matsuda, Thomas Keller, Olivier Delaire, Roger Pynn, Jaime A. Fernandez-Baca

^*Corresponding author for this work

RST/Fundamental Aspects of Materials and Energy

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

6 Citations (Scopus)

100 Downloads (Pure)

Abstract

The energy resolution of the conventional way of measuring a small change in a phonon dispersion curve using neutron scattering is restricted by the relatively coarse intrinsic resolution ellipsoid of the neutron triple-axis spectrometer (TAS). By implementing inelastic neutron spin echo on the host TAS using the Larmor precession of the neutron spin, the energy resolution of such measurements can be further improved without reducing the resolution ellipsoid. Measurements of the temperature-dependent phonon energy change are demonstrated using superconducting magnetic Wollaston prisms at the HB-1 instrument of the High-Flux Isotope Reactor at Oak Ridge National Laboratory, and the achievable resolution is <10 µeV.

Original language	English
Pages (from-to)	755-760
Number of pages	6
Journal	Journal of Applied Crystallography
Volume	52
Issue number	4
DOIs	https://doi.org/10.1107/S1600576719008008
Publication status	Published - 2019

Keywords

high energy resolution
inelastic neutron scattering
inelastic neutron spin echo
neutron Larmor labeling

Access to Document

10.1107/S1600576719008008

in5021Final published version, 726 KB

Cite this

@article{1c13c0ca3fa8429a9164ed3df2278ce4,

title = "High-resolution phonon energy shift measurements with the inelastic neutron spin echo technique",

abstract = "The energy resolution of the conventional way of measuring a small change in a phonon dispersion curve using neutron scattering is restricted by the relatively coarse intrinsic resolution ellipsoid of the neutron triple-axis spectrometer (TAS). By implementing inelastic neutron spin echo on the host TAS using the Larmor precession of the neutron spin, the energy resolution of such measurements can be further improved without reducing the resolution ellipsoid. Measurements of the temperature-dependent phonon energy change are demonstrated using superconducting magnetic Wollaston prisms at the HB-1 instrument of the High-Flux Isotope Reactor at Oak Ridge National Laboratory, and the achievable resolution is <10 µeV.",

keywords = "high energy resolution, inelastic neutron scattering, inelastic neutron spin echo, neutron Larmor labeling",

author = "Fankang Li and Jiazhou Shen and Parnell, {Steven R.} and Thaler, {Alex N.} and Masaaki Matsuda and Thomas Keller and Olivier Delaire and Roger Pynn and Fernandez-Baca, {Jaime A.}",

year = "2019",

doi = "10.1107/S1600576719008008",

language = "English",

volume = "52",

pages = "755--760",

journal = "Journal of Applied Crystallography",

issn = "0021-8898",

publisher = "International Union of Crystallography",

number = "4",

}

TY - JOUR

T1 - High-resolution phonon energy shift measurements with the inelastic neutron spin echo technique

AU - Li, Fankang

AU - Shen, Jiazhou

AU - Parnell, Steven R.

AU - Thaler, Alex N.

AU - Matsuda, Masaaki

AU - Keller, Thomas

AU - Delaire, Olivier

AU - Pynn, Roger

AU - Fernandez-Baca, Jaime A.

PY - 2019

Y1 - 2019

N2 - The energy resolution of the conventional way of measuring a small change in a phonon dispersion curve using neutron scattering is restricted by the relatively coarse intrinsic resolution ellipsoid of the neutron triple-axis spectrometer (TAS). By implementing inelastic neutron spin echo on the host TAS using the Larmor precession of the neutron spin, the energy resolution of such measurements can be further improved without reducing the resolution ellipsoid. Measurements of the temperature-dependent phonon energy change are demonstrated using superconducting magnetic Wollaston prisms at the HB-1 instrument of the High-Flux Isotope Reactor at Oak Ridge National Laboratory, and the achievable resolution is <10 µeV.

AB - The energy resolution of the conventional way of measuring a small change in a phonon dispersion curve using neutron scattering is restricted by the relatively coarse intrinsic resolution ellipsoid of the neutron triple-axis spectrometer (TAS). By implementing inelastic neutron spin echo on the host TAS using the Larmor precession of the neutron spin, the energy resolution of such measurements can be further improved without reducing the resolution ellipsoid. Measurements of the temperature-dependent phonon energy change are demonstrated using superconducting magnetic Wollaston prisms at the HB-1 instrument of the High-Flux Isotope Reactor at Oak Ridge National Laboratory, and the achievable resolution is <10 µeV.

KW - high energy resolution

KW - inelastic neutron scattering

KW - inelastic neutron spin echo

KW - neutron Larmor labeling

UR - http://www.scopus.com/inward/record.url?scp=85068377006&partnerID=8YFLogxK

U2 - 10.1107/S1600576719008008

DO - 10.1107/S1600576719008008

M3 - Article

AN - SCOPUS:85068377006

SN - 0021-8898

VL - 52

SP - 755

EP - 760

JO - Journal of Applied Crystallography

JF - Journal of Applied Crystallography

IS - 4

ER -

High-resolution phonon energy shift measurements with the inelastic neutron spin echo technique

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this