Electrical detection of topological magnetic textures such as skyrmions is currently limited to conducting materials. Although magnetic insulators offer key advantages for skyrmion technologies with high speed and low loss, they have not yet been explored electrically. Here, we report a prominent topological Hall effect in Pt/Tm₃Fe₅O₁₂ bilayers, where the pristine Tm₃Fe₅O₁₂ epitaxial films down to 1.25 unit cell thickness allow for tuning of topological Hall stability over a broad range from 200 to 465 K through atomic-scale thickness control. Although Tm₃Fe₅O₁₂ is insulating, we demonstrate the detection of topological magnetic textures through a novel phenomenon: “spin-Hall topological Hall effect” (SH-THE), where the interfacial spin–orbit torques allow spin-Hall-effect generated spins in Pt to experience the unique topology of the underlying skyrmions in Tm₃Fe₅O₁₂. This novel electrical detection phenomenon paves a new path for utilizing a large family of magnetic insulators in future skyrmion technologies.

中文翻译：

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高度可调的Pt /铁磁绝缘体双层中的自旋霍尔拓扑霍尔效应

目前，对拓扑磁纹理（例如天体离子）的电检测仅限于导电材料。尽管磁绝缘体以高速度和低损耗为skyrmion技术提供了关键优势，但尚未进行电气方面的探索。在这里，我们报道了Pt / Tm ₃ Fe ₅ O ₁₂双层中显着的拓扑霍尔效应，其中原始的Tm ₃ Fe ₅ O ₁₂外延膜低至1.25单元厚度允许在200的宽范围内调整拓扑霍尔稳定性通过原子级厚度控制达到465K。虽然Tm ₃ Fe ₅ O ₁₂由于是绝缘的，我们通过一种新现象展示了对拓扑磁织构的检测：“自旋霍尔拓扑霍尔效应”（SH-THE），其中界面自旋轨道转矩使自旋霍尔效应在Pt中产生的自旋经历了Tm ₃ Fe ₅ O _12中下层天空的独特拓扑。这种新颖的电学检测现象为在未来的Skyrmion技术中利用大量的磁绝缘子开辟了一条新途径。