Accurate simulations of magnetic excitations in the neutron simulation package McStas

2025/11/27 by Silas B. Schack, Kristine M. L. Krighaar, Schack, Silas B. +5 · 1 citation
Physics and Astronomy · Chemistry · #Nuclear Physics and Applications #Advanced NMR Techniques and Applications #Atomic and Subatomic Physics Research

paper · pdf · doi:10.48550/arxiv.2511.22516

Abstract

A new component for the accurate simulation of neutron scattering from magnetic excitations has been developed for the neutron ray-tracing software McStas. The component SpinWave_BCO simulates inelastic neutron scattering from ferro-, antiferro-, and altermagnetic excitations in a body-centered orthorhombic crystal structure, where the dispersion relation and scattered neutron intensities are derived using linear spin wave theory. Data from a simulated Triple-Axis Spectrometer with an extremely high resolution have been verified by direct comparison with theory and by comparison to data simulated using the package SpinW. The component serves as a proof-of-concept for the implementation of a more general linear spin wave component in McStas.

Citations

• Altermagnetism revealed by polarized neutrons in MnF₂

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