发表机构
Instituto de Nanociencia y Nanotecnología, CNEA–CONICET; Instituto Balseiro, Universidad Nacional de Cuyo–CNEA; Departamento Magnetismo y Materiales Magnéticos, Gerencia de Física, Centro Atómico Bariloche; Spintec, Université Grenoble Alpes, CNRS, CEA, Grenoble INP, IRIG-SPINTEC（纳米科学与技术研究所，CNEA-CONICET; 巴尔塞罗研究所，门多萨国立大学-CNEA; 巴里洛切原子中心物理管理部磁学与磁性材料系; 自旋科学实验室，格勒诺布尔阿尔卑斯大学，法国国家科学研究中心，法国原子能和替代能源委员会，格勒诺布尔理工学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过Tb/Co多层膜的倾斜磁各向异性实现面内磁场对反常霍尔响应的控制，提出宏自旋模型解释机制，为霍尔传感器和自旋电子器件提供新途径。
AI 中文摘要
工程化磁各向异性为控制磁化方向并解锁光自旋电子学和电流驱动器件中的新兴功能提供了强大途径。除其在磁化翻转中的作用外，有效各向异性还能强烈影响磁输运响应，为调控新器件功能提供了额外自由度。在本工作中，我们报道了具有Tb厚度梯度的亚铁磁[Tb/Co]$_{\ imes 5}$多层膜的磁输运研究，其楔形结构使单轴各向异性轴略微偏离薄膜法线。80 K至300 K范围内的反常霍尔电阻率测量揭示了自旋重取向转变，而磁输运响应的角度依赖性则暴露了倾斜各向异性的关键作用。一个简化的宏自旋模型重现了转变过程中完整的角响应，并表明当面内磁场施加时观察到的反常霍尔效应源于单轴各向异性轴的倾斜，该倾斜提供了内建的对称性破缺机制，使得面内磁场能够控制面外反常霍尔响应（包括其符号）。这些发现确立了倾斜磁各向异性作为基于霍尔效应传感器应用的有前景途径，并凸显了Tb/Co多层膜作为各向异性工程化自旋电子器件多功能平台的潜力。
英文摘要
Engineering magnetic anisotropy provides a powerful route to control magnetization orientation and unlock emerging functionalities in opto-spintronic and current-driven devices. Beyond its role in magnetization reversal, the effective anisotropy can strongly influence the magnetotransport response, offering an additional degree of freedom to tune new device functionalities. In this work, we report a magnetotransport study of a ferrimagnetic [Tb/Co]$_{\times 5}$ multilayer grown with a Tb thickness gradient, whose wedge-shaped tilts the uniaxial anisotropy axis slightly away from the film normal. Anomalous Hall resistivity measurements from 80 K to 300 K reveal a spin reorientation transition, while the angular dependence of the magnetotransport responses exposes the crucial role of the tilted anisotropy. A simplified macrospin model reproduces the full angular response across the transition and shows that the observed anomalous Hall effect when the in-plane magnetic field is applied originates from the tilt of the uniaxial anisotropy axis, which supplies a built-in symmetry-breaking mechanism, enabling in-plane field control over the out-of-plane anomalous Hall response, sign included. These findings establish tilted magnetic anisotropy as a promising route toward Hall effect-based sensor applications and highlight Tb/Co multilayers as a versatile platform for anisotropy-engineered spintronic devices.
