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Manipulating the Magnetic Bubbles and Topological Hall Effect in 2D Magnet Fe5GeTe2
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-12-01 , DOI: 10.1002/adfm.202308560
Xiaowei Lv 1 , Yalei Huang 2 , Ke Pei 1 , Chendi Yang 1 , Tingjia Zhang 1, 3 , Wei Li 3 , Guixin Cao 2, 4 , Jincang Zhang 4 , Yuxiang Lai 5 , Renchao Che 1, 4
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-12-01 , DOI: 10.1002/adfm.202308560
Xiaowei Lv 1 , Yalei Huang 2 , Ke Pei 1 , Chendi Yang 1 , Tingjia Zhang 1, 3 , Wei Li 3 , Guixin Cao 2, 4 , Jincang Zhang 4 , Yuxiang Lai 5 , Renchao Che 1, 4
Affiliation
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Recent observations of nontrivial spin textures and topological Hall effect (THE) in 2D van der Waals (vdW) ferromagnets have stimulated high interest in both fundamental physics and prospective spintronic applications. However, effectively manipulating spin textures and their exhibiting THE, which is the prerequisite for topology-based 2D vdW devices, remains challenging. Here, the effective manipulation of the magnetic bubbles and THE is achieved in Fe5GeTe2 (FGT) crystals by utilizing Lorentz imaging and electrical transport measurements. The density and size of magnetic bubbles can be modulated effectively as the temperature and lamella thickness change, indicating the role of magnetocrystalline anisotropy and long-range magnetic dipolar interaction is demonstrated, respectively. More importantly, the spin configurations of bubbles along with THE signal vary with sample thickness, demonstrating a topological transition between skyrmion bubbles and trivial bubbles. The key point lies in the presence or absence of Bloch lines in the stripe domain at different thicknesses. This study presents the reliable manipulations of spin textures and THE in FGT, which may provide valuable insights into the design of 2D vdW devices in spintronics.
中文翻译:
操纵二维磁铁 Fe5GeTe2 中的磁泡和拓扑霍尔效应
最近对二维范德华 (vdW) 铁磁体中重要的自旋纹理和拓扑霍尔效应 (THE) 的观察激发了人们对基础物理和未来自旋电子学应用的高度兴趣。然而,有效操纵自旋纹理及其展示 THE(这是基于拓扑的 2D vdW 设备的先决条件)仍然具有挑战性。在这里,通过利用洛伦兹成像和电传输测量,在 Fe 5 GeTe 2 (FGT) 晶体中实现了对磁泡和 THE 的有效操纵。随着温度和片层厚度的变化,磁泡的密度和尺寸可以得到有效的调节,分别表明磁晶各向异性和长程磁偶极相互作用的作用。更重要的是,气泡的自旋构型以及信号随样品厚度的变化而变化,证明了斯格明子气泡和平凡气泡之间的拓扑转变。关键在于不同厚度的条带域中是否存在布洛赫线。这项研究展示了 FGT 中自旋纹理和 THE 的可靠操作,这可能为自旋电子学中 2D vdW 器件的设计提供有价值的见解。
更新日期:2023-12-01
中文翻译:
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操纵二维磁铁 Fe5GeTe2 中的磁泡和拓扑霍尔效应
最近对二维范德华 (vdW) 铁磁体中重要的自旋纹理和拓扑霍尔效应 (THE) 的观察激发了人们对基础物理和未来自旋电子学应用的高度兴趣。然而,有效操纵自旋纹理及其展示 THE(这是基于拓扑的 2D vdW 设备的先决条件)仍然具有挑战性。在这里,通过利用洛伦兹成像和电传输测量,在 Fe 5 GeTe 2 (FGT) 晶体中实现了对磁泡和 THE 的有效操纵。随着温度和片层厚度的变化,磁泡的密度和尺寸可以得到有效的调节,分别表明磁晶各向异性和长程磁偶极相互作用的作用。更重要的是,气泡的自旋构型以及信号随样品厚度的变化而变化,证明了斯格明子气泡和平凡气泡之间的拓扑转变。关键在于不同厚度的条带域中是否存在布洛赫线。这项研究展示了 FGT 中自旋纹理和 THE 的可靠操作,这可能为自旋电子学中 2D vdW 器件的设计提供有价值的见解。