单斜 FeGe 薄膜中的铁磁性与结构相变
Ferromagnetism and structural phase transition in monoclinic FeGe film
AI总结：
本文在 Al2O3 (001) 上外延生长单斜 FeGe 薄膜，发现其具有约 800 K 的铁磁性与反常霍尔效应，并在约 100 K 处观测到结构相变，丰富了 FeGe 家族相图。
摘要：
二元化合物 FeGe 具有多种结构，从立方、六方到单斜。与立方相中众所周知的斯格明子晶格和六方相中的反铁磁电荷密度波相比，单斜 FeGe 的研究较少。在此，我们在 Al2O3 (001) 衬底上合成了单斜 FeGe 薄膜，并研究了其结构、磁性和输运性质。X 射线衍射和透射电子显微镜表征表明，FeGe 薄膜与衬底呈外延关系。与反铁磁体相不同，单斜 FeGe 薄膜具有铁磁性，居里温度高达约 800 K，这导致了输运测量中的反常霍尔效应。与六方 FeGe 类似，我们通过透射电子显微镜在实空间和倒空间中捕捉到单斜 FeGe 薄膜在约 100 K 处发生结构相变。我们的工作丰富了 FeGe 家族的相图，并表明 FeGe 为研究多相转变及相关器件应用提供了理想平台。
英文摘要：
Binary compound FeGe hosts multiple structures, from cubic and hexagonal to monoclinic. Compared to the well-known skyrmion lattice in the cubic phase and the antiferromagnetic charge-density wave in the hexagonal phase, the monoclinic FeGe is less explored. Here, we synthesized the monoclinic FeGe films on Al2O3 (001) and studied their structural, magnetic, and transport properties. X-ray diffraction and transmission electron microscopy characterizations indicate that the FeGe films are epitaxial to the substrate. Unlike the antiferromagnetic bulk, the monoclinic FeGe films are ferromagnetic with Curie-temperature as high as ~ 800 K, contributing to the anomalous Hall effect in the transport measurements. Similar to the hexagonal FeGe, we captured a structural phase transition in the monoclinic FeGe films at ~ 100 K in real and reciprocal spaces by transmission electron microscope. Our work enriches the phase diagram of the FeGe family and suggests that FeGe offers an ideal platform for studying multiphase transitions and related device applications.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
