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 Pynna; 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 Pynna, Jaime A. Fernandez-Baca

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

8 Scopus citations

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 magneticWollaston prisms at the HB-1 instrument of the High-Flux Isotope Reactor at Oak Ridge National Laboratory, and the achievable resolution is <10 meV.

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
State	Published - Aug 2019

Funding

This research was sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the US Department of Energy. OD acknowledges funding from the US Department of Energy, Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division, under award No. DE-SC0016166.

Funders	Funder number
US Department of Energy
UT-Battelle
Office of Science
Basic Energy Sciences	DE-SC0016166
Oak Ridge National Laboratory
Laboratory Directed Research and Development
Division of Materials Sciences and Engineering

Keywords

High energy resolution
Inelastic neutron scattering
Inelastic neutron spin echo
Neutron Larmor labeling

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10.1107/S1600576719008008

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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 magneticWollaston prisms at the HB-1 instrument of the High-Flux Isotope Reactor at Oak Ridge National Laboratory, and the achievable resolution is <10 meV.",

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 Pynna and Fernandez-Baca, {Jaime A.}",

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doi = "10.1107/S1600576719008008",

language = "English",

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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 - Pynna, Roger

AU - Fernandez-Baca, Jaime A.

PY - 2019/8

Y1 - 2019/8

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 magneticWollaston prisms at the HB-1 instrument of the High-Flux Isotope Reactor at Oak Ridge National Laboratory, and the achievable resolution is <10 meV.

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 magneticWollaston prisms at the HB-1 instrument of the High-Flux Isotope Reactor at Oak Ridge National Laboratory, and the achievable resolution is <10 meV.

KW - High energy resolution

KW - Inelastic neutron scattering

KW - Inelastic neutron spin echo

KW - Neutron Larmor labeling

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DO - 10.1107/S1600576719008008

M3 - Article

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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

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Keywords

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