Eu(Al₀.₄Ga₀.₆)₄中通过空间分辨共振弹性X射线散射（REXS）成像的共线与非共线自旋织构的竞争
Competing collinear and non-collinear spin textures imaged by spatially-resolved REXS in Eu(Al0.4Ga0.6)4
AI总结：
研究采用空间分辨REXS表征Eu(Al₀.₄Ga₀.₆)₄的磁自旋织构，发现其存在共线与非共线自旋织构的空间竞争及磁相变相关特性，凸显空间分辨探针的重要性。
AI中文摘要：
本研究采用共振弹性X射线散射（REXS）对Eu(Al₀.₄Ga₀.₆)₄的零场磁自旋织构的不均匀性进行研究。通过空间分辨REXS，研究发现T_N1 = 17 K和T_N2 = 14 K处的两个磁相变源自两对近简并但不同的正交q矢量；对应的相在空间上分离，样品的一部分包含共存的正交自旋密度波畴，另一部分则包含共存的正交螺旋畴。此外，螺旋态形成反演畴，表明磁相变前反演对称性未被破坏。研究结果显示，磁态为单q，且在样品表面0.8-1 mm范围内自旋织构存在较大差异；同时，局部探测与全局探测的磁织构存在明显差异，而这类差异通常被认为可代表整个系统，因此凸显了空间分辨探针对准确描述这类材料磁行为的重要性。
英文摘要：
Here, we use resonant elastic x-ray scattering (REXS) to investigate the inhomogeneity of the zero-field magnetic spin texture of Eu(Al$_{0.4}$Ga$_{0.6}$)$_4$. By using spatially-resolved REXS, we show that the two magnetic transitions at T$_{N1}$ = 17 K and T$_{N2}$ = 14 K originate from two nearly degenerate, yet distinct, orthogonal pairs of q-vectors. The corresponding phases are segregated spatially, such that one fraction of the sample comprises coexisting orthogonal spin-density-wave domains, while another fraction hosts coexisting orthogonal helical domains. Additionally, the helical state forms inversion domains indicating that the inversion symmetry is not broken prior the magnetic transition. Our results suggest that the magnetic state is single-q and revealed a large variation of spin textures across a 0.8 - 1 mm area of the sample surface. These results demonstrate clear differences between the locally and globally probed magnetic textures, typically assumed to be representative of the system as a whole, highlighting the importance of spatially-resolved probes for accurately describing the magnetic behavior of this class of materials.
