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arXiv · 2606.10516

SANS and magnetometry study of the magnetic phase diagram of the B20 helimagnet FeRhSi

E. V. Altynbaev·A. V. Guseva·D. O. Skanchenko·V. N. Krasnorussky·A. V. Bokov·D. A. Salamatin·V. A. Sidorov·A. V. Tsvyashchenko
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Abstract

This manuscript reports the first direct neutron-scattering evidence for long-period helimagnetism in the newly identified 4d-substituted B20 compound Fe0.5Rh0.5Si. By combining SANS with low-field magnetometry, we establish the magnetic modulation, construct a field-temperature phase diagram, and identify a candidate A-phase region supported by an independent structural signature. The work is important beyond this single compound because it expands the family of chiral B20 helimagnets into Rh-substituted materials, where spin-orbit coupling, disorder, and Dzyaloshinskii-Moriya interactions can be tuned. It will interest researchers in chiral magnetism, topological spin textures, magnetic neutron scattering, and quantum materials, and provides a foundation for future studies of emergent magnetic phases and topology-driven phenomena in chemically tuned chiral magnets.

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E. V. Altynbaev, A. V. Guseva, D. O. Skanchenko, V. N. Krasnorussky, A. V. Bokov, D. A. Salamatin, V. A. Sidorov, A. V. Tsvyashchenko. 2026-06-09. SANS and magnetometry study of the magnetic phase diagram of the B20 helimagnet FeRhSi. https://arxiv.org/abs/2606.10516

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