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

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

doi:10.1107/S1600576719008008

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

Journal Article · Fri Jun 28 00:00:00 EDT 2019 · Journal of Applied Crystallography (Online)

DOI:https://doi.org/10.1107/S1600576719008008· OSTI ID:1546533

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^[2]; Parnell, Steven R. ^[3];

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Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Indiana Univ., Bloomington, IN (United States)
Delft Univ. of Technology (Netherlands)
Max-Planck-Inst. fur Festkorperforschung, Stuttgart (Germany)
Duke Univ., Durham, NC (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Indiana Univ., Bloomington, IN (United States)

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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1546533

Journal Information:: Journal of Applied Crystallography (Online), Vol. 52, Issue 4; ISSN 1600-5767

Publisher:: International Union of CrystallographyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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Cited By (1)

Design and performance of a superconducting neutron resonance spin flipper Dadisman, Ryan; Wasilko, David; Kaiser, Helmut Review of Scientific Instruments, Vol. 91, Issue 1 https://doi.org/10.1063/1.5124681	journal	January 2020

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