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arXiv · 2208.08188

Polarized neutron scattering study on the centrosymmetric skyrmion host material Gd2PdSi3

Jiwon Ju·Hiraku Saito·Takashi Kurumaji·Max Hirschberger·Akiko Kikkawa·Yasujiro Taguchi·Taka-hisa Arima·Yoshinori Tokura·Taro Nakajima
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Abstract

We have investigated magnetic structures of the centrosymmetrric skyrmion material Gd2PdSi3 by means of polarized neutron scattering near zero field with an isotope-160Gd-enriched single crystal. In a previous study, magnetic structures in Gd2PdSi3 at low temperatures were studied by resonant X-ray scattering measurements [T. Kurumaji et al. Science 365, 914 (2019)]. The present polarized neutron results confirm that the magnetic structure in zero field has elliptic screw-type magnetic modulation with a propagation vector of (q, 0, 0) with q ~ 0.14 and its equivalents. As the temperature increases, the system undergoes a magnetic phase transition while keeping the incommensurate q-vector of (q,0,0). We found that the thermally-induced phase has sinusoidal magnetic modulations with magnetic moments perpendicular both to the c axis and to the q-vector. We also investigate the spin-helicity degree of freedom in the ground state by polarized neutrons, revealing that the system contains equal fractions of the left-handed and right-handed screw-type orders as expected from the centrosymmetric crystal structure.

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Jiwon Ju, Hiraku Saito, Takashi Kurumaji, Max Hirschberger, Akiko Kikkawa, Yasujiro Taguchi, Taka-hisa Arima, Yoshinori Tokura, Taro Nakajima. 2022-08-17. Polarized neutron scattering study on the centrosymmetric skyrmion host material Gd2PdSi3. https://arxiv.org/abs/2208.08188

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