Journal Article

IMPULSE-2021-00282

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Neutron Spin‐Echo Instrumentation for Magnetic Scattering

Keller, T. ; Trepka, H.MLZ* ; Habicht, K.MLZ* ; Keimer, B.

2022
Wiley-VCH Weinheim

Please use a persistent id in citations: doi:10.1002/pssb.202100164

Abstract: Neutron spin-echo (NSE) spectroscopy is a powerful tool for the study of magnon lifetimes and magnetic critical dynamics. The unique property of NSE is the energy resolution in the μeV range. The first NSE spectrometers were optimized for quasielastic scattering at small momentum transfers and delivered substantial contributions to the understanding of critical dynamics in ferromagnets and dynamic correlations in spin glasses. The subsequent resonant NSE (NRSE) technique extends the parameter range toward large momentum and energy transfers and permits to measure magnon lifetimes across the Brillouin zone. NRSE also comprises the Larmor diffraction (LD) mode with a resolution for lattice spacings and their variance Δ𝑑$_{ℎ𝑘𝑙}$/𝑑$_{ℎ𝑘𝑙}$ of order 10$^{−6}$ . LD proves useful to determine magnetostriction effects, small lattice distortions related to magnetic ordering, mosaic spread in crystals, and the size distribution of antiferromagnetic domains. Both typical experiments and the related technical innovation are reviewed and an outlook on future developments is given.

Keyword(s): Magnetic Materials (1st) ; Instrument and Method Development (2nd)

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Contributing Institute(s):

1. TRISP (TRISP)

Experiment(s):

1. TRISP: Three axes spin echo spectrometer (SR5b)

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; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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