ISIS Neutron and Muon Source Data Journal

Mapping the magnon spectra in the skyrmion phase of MnSi

Abstract: In cubic B20 structures, skyrmions, topologically-protected three-dimensional spin textures, arise from competition of the ferromagnetic exchange interaction and the Dzyaloshinskii-Moriya interaction. The common magnetic ground state of these materials consists of helical spin waves; the excitation spectrum is complex, consisting of many helimagnon bands, due to the tiny propagation wave-vector. A skyrmion lattice is a superposition of three phase-locked helices propagating in a triangular lattice plane perpendicular to the magnetic field. We have succeeded calculating the excitation spectrum for the A-phase; from our theoretical calculations, the spectra consist of many low energy bands with concentrations of higher spectral weight forming broad “bands”. We propose to measure these excitations on LET to quantify the microscopic magnetic interactions within the skyrmion phase of MnSi.

Principal Investigator: Dr David Fobes
Experimenter: Professor Marein Rahn
Experimenter: Mr Lukas Beddrich
Experimenter: Dr Tobias Weber
Local Contact: Dr Rob Bewley
Experimenter: Professor Peter Boni
Experimenter: Dr Marc Janoschek

DOI: 10.5286/ISIS.E.RB1720033

ISIS Experiment Number: RB1720033

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Dr David Fobes et al; (2018): Mapping the magnon spectra in the skyrmion phase of MnSi, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1720033

Data is released under the CC-BY-4.0 license.