三维纳米磁电路中的非平面几何效应对磁电信号的影响
Non-planar geometrical effects on the magnetoelectrical signal in a three-dimensional nanomagnetic circuit
AI总结：
本研究通过实验与模拟结合，揭示了三维纳米磁电路中非平面几何导致反常霍尔效应异常角度依赖及非共线退磁场引发磁振子磁电阻，对理解三维自旋电子学至关重要。
摘要：
将纳米磁学和自旋电子学扩展到三维（3D）领域为基础研究和技术研究提供了巨大机遇。然而，探测复杂三维几何结构对磁电现象的影响带来了重要的实验和理论挑战。在本工作中，我们利用直写纳米制造技术，研究了集成在微电子电路中的铁磁三维纳米器件的磁电信号。由于电流和磁化强度都具有三维矢量特性，多种磁电效应会发生复杂叠加。通过施加三维磁场进行电学测量，并结合宏自旋模拟和有限元建模，我们解析了叠加效应，发现三维几何结构如何导致诸如反常霍尔效应等已知磁输运效应出现异常的角度依赖性。至关重要的是，我们的分析还揭示了三维纳米结构固有的非共线退磁场的重要作用，这导致了一种具有角度依赖性的磁振子磁电阻，并对总磁电信号有显著贡献。这些发现对于理解三维自旋电子系统至关重要，并为进一步的基础研究和基于器件的研究奠定了基础。
英文摘要：
Expanding nanomagnetism and spintronics into three dimensions (3D) offers great opportunities for both fundamental and technological studies. However, probing the influence of complex 3D geometries on magnetoelectrical phenomena poses important experimental and theoretical challenges. In this work, we investigate the magnetoelectrical signals of a ferromagnetic 3D nanodevice integrated into a microelectronic circuit using direct-write nanofabrication. Due to the 3D vectorial nature of both electrical current and magnetisation, a complex superposition of several magnetoelectrical effects takes place. By performing electrical measurements under the application of 3D magnetic fields, in combination with macrospin simulations and finite element modelling, we disentangle the superimposed effects, finding how a 3D geometry leads to unusual angular dependences of well-known magnetotransport effects such as the anomalous Hall effect. Crucially, our analysis also reveals a strong role of the noncollinear demagnetising fields intrinsic to 3D nanostructures, which results in an angular dependent magnon magnetoresistance contributing strongly to the total magnetoelectrical signal. These findings are key to the understanding of 3D spintronic systems and underpin further fundamental and device-based studies.
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。
