Inelastic Neutron Scattering Study of Phonon Dispersion Relation in Higher Manganese Silicides
Source abstract
Abstract
We report inelastic neutron scattering (INS) measurements of the phonon dispersion relation in higher manganese silicides (HMSs). A large ingot of HMS is synthesized using a slow cooling method, which is found to have Mn15Si26 as the primary phase. The sample is composed of highly oriented crystallites as confirmed by a neutron pole-figure study and thermal conductivity data. Our INS results are mostly consistent with earlier experimental and theoretical phonon studies in HMS, including the presence of a low-lying twisting mode. However, some discrepancies are also observed. Most notably, a 5 meV gap at the zone center and the softer dispersion relation of the low-lying twisting mode. We discuss the potential origins of these observations and their implications for the thermal properties of HMS.
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Research context
OpenAlex topics: Semiconductor materials and interfaces · Rare-earth and actinide compounds · Intermetallics and Advanced Alloy Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, University of Toronto, Toronto, ON M5S 1A7, Canada
National Research Council, Canadian Neutron Beam Centre, Chalk River, ON K0J 1J0, Canada
CanmetMATERIALS, Natural Resources Canada, Hamilton, ON L8P 0A5, Canada
Funding
Collaborative Research and Training Experience (CREATE) program · Discovery Grant · Program of Energy Research and Development
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