Polarized neutron scattering study of the centrosymmetric skyrmion host material Gd2PdSi3
Polarized neutron scattering study of the centrosymmetric skyrmion host material Gd2PdSi3
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中心对称斯格明子主体材料Gd2PdSi3的偏振中子散射研究
DOI：
10.1103/physrevb.107.024405
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发表时间：
2023
影响因子：
3.7
通讯作者：
Nakajima Taro
中科院分区：
文献类型：
--
作者：
Ju Jiwon;Saito Hiraku;Kurumaji Takashi;Hirschberger Max;Kikkawa Akiko;Taguchi Yasujiro;Arima Taka-hisa;Tokura Yoshinori;Nakajima Taro
我们通过富同位素单晶近零场的极化中子散射研究了中心对称斯格明子材料的磁结构。在之前的研究中，通过共振 X 射线散射测量研究了低温下的磁性结构 [T. Kurumajiet 等人，科学 365, 914 (2019)0036-807510.1126/science.aau0968]。目前的极化中子结果证实零场磁结构具有传播矢量为with及其等价的椭圆螺旋型磁调制。随着温度升高，系统会经历磁相变，同时保持不通约矢量。我们发现热感应相具有正弦磁调制，磁矩垂直于轴和 q 向量。我们还研究了极化中子在基态下的自旋螺旋自由度，揭示了该系统包含相等比例的左旋和右旋螺旋型订单，正如中心对称晶体结构所预期的那样。
We investigated magnetic structures of the centrosymmetric skyrmion materialby means of polarized neutron scattering near zero field with an isotope--enriched single crystal. In a previous study, magnetic structures inat low temperatures were studied by resonant x-ray scattering measurements [T. Kurumajiet al., Science 365, 914 (2019)0036-807510.1126/science.aau0968]. The present polarized neutron results confirm that the magnetic structure in zero field has elliptic screw-type magnetic modulation with a propagation vector ofwithand its equivalents. As the temperature increases, the system undergoes a magnetic phase transition while keeping the incommensurate-vector of. We found that the thermally induced phase has sinusoidal magnetic modulations with magnetic moments perpendicular both to theaxis 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.