AI 中文总结
研究(Fe$_{0.63}$Ni$_{0.3}$Pd$_{0.07}$)$_3$P的矢量场调控，发现其磁条纹取向可随温度演化的各向异性相互作用调控，确立其为手性自旋结构矢量场调控的模型系统
AI 中文摘要
(Fe$_{0.63}$Ni$_{0.3}$Pd$_{0.07}$)$_3$P是具有$S_4$对称性的室温磁体，包含丰富的拓扑自旋结构。本文报道了对(Fe$_{0.63}$Ni$_{0.3}$Pd$_{0.07}$)$_3$P在宽温度范围矢量磁场下的共振小角X射线散射与ptychography结合研究。我们实现了对磁畴条纹的确定性矢量场调控，其中面内磁场通过手性条纹到手性扇状构型的转变连续旋转条纹取向。此外，在50 K及以下，条纹取向呈亚稳态钉扎并保留磁场训练的方向。室温下波矢大小在基面内几乎各向同性，冷却时出现各向异性相互作用的显著温度演化。特别地，在20-50 K形成非平凡各向异性轴，反映了磁晶各向异性、各向异性交换与Dzyaloshinskii-Moriya相互作用（DMI）的综合效应，其有效取向随温度旋转。这些结果确立(Fe$_{0.63}$Ni$_{0.3}$Pd$_{0.07}$)$_3$P为手性自旋结构矢量场调控的模型系统，并揭示了非中心对称磁体中有效DMI环境随温度的未知演化
英文摘要
(Fe$_{0.63}$Ni$_{0.3}$Pd$_{0.07}$)$_3$P is a room-temperature magnet with $S_4$ symmetry that hosts a rich variety of topological spin textures. Here, we report a combined resonant small-angle x-ray scattering and ptychography study of (Fe$_{0.63}$Ni$_{0.3}$Pd$_{0.07}$)$_3$P in vector magnetic fields over a broad temperature range. We demonstrate deterministic vector-field control of magnetic stripe domains, where in-plane fields continuously rotate their orientation via a transition from a chiral stripe to an achiral fan configuration. Furthermore, at 50 K and below, the stripe orientation becomes metastably pinned and retains its field-trained direction. While the magnitude of the wavevector is nearly isotropic within the basal plane at room temperature, a pronounced temperature evolution of anisotropic interactions emerges upon cooling. In particular, non-trivial anisotropy axes develop at 20-50 K reflecting the combined effects of magnetocrystalline anisotropy, anisotropic exchange, and Dzyaloshinskii-Moriya interaction (DMI), whose effective orientation is found to rotate with temperature. These results establish (Fe$_{0.63}$Ni$_{0.3}$Pd$_{0.07}$)$_3$P as a model system for vector-field control of chiral spin textures and reveal a previously unrecognized temperature-driven evolution of the effective DMI landscape in a noncentrosymmetric magnet.
