曲率诱导的曲率和磁性配置在垂直膜的修改
David Raftrey1,2, Dhritiman Bhattacharya3, Colin Langton3
1Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
ACS nano
|August 11, 2025
概括
曲线磁纳米结构改变了自旋纹理和域行为. 引入曲率创建了一个Dzyaloshinskii-Moriya相互作用 (DMI),增强域壁稳定性,用于先进的自旋电子设备.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 纳米技术 纳米技术
背景情况:
- 设计3D磁性纳米结构是先进的自旋电子学的关键.
- 曲率影响磁能景观和旋转纹理.
- 控制非对线旋转纹理对于下一代设备至关重要.
研究的目的:
- 实验性地研究3D磁化纹理在曲面上的Co/Pd多层.
- 了解曲率如何影响磁域结构.
- 为了探索曲率诱导的现象,如Dzyaloshinskii-Moriya相互作用 (DMI).
主要方法:
- 在曲的Cu纳米线网 (50纳米直径) 上制造Co/Pd多层薄膜.
- 磁性软X射线纳米图谱用于3D磁域重建 (分辨率约30nm).
- 微磁模拟用于理论支持.
主要成果:
- 磁化与局部表面正常相对应,这是由于界面异质性.
- 曲线纳米线诱导沿轴的优先域对齐.
- 直接观察和量化曲率诱导的DMI (大约. 1/3 的内在 DMI).
- 曲率诱导的DMI增强了尼尔型域壁的稳定性.
结论:
- 引入曲率是一种强大的方法来定制磁纳米结构.
- 与平面膜相比,曲线磁膜表现出独特的域行为.
- 这些发现为3D赛道记忆和神经形态计算设备铺平了道路.
相关概念视频
Chirality in Nature
13.8K
Chirality is the most intriguing yet essential facet of nature, governing life’s biochemical processes and precision. It can be observed from a snail shell pattern in a macroscopic world to an amino acid, the minutest building block of life. Most of the snails around the world have right-coiled shells because of the intrinsic chirality in their genes. All the amino acids present in the human body exist in an enantiomerically pure state, except for glycine - the sole achiral amino acid.
13.8K
π Electron Effects on Chemical Shift: Overview
1.1K
An applied magnetic field causes loosely bound π-electrons in organic molecules to circulate, producing a local or induced diamagnetic field over a large spatial volume. As the molecules tumble in solution, the field generated by π-electrons in spherical substituents results in a zero net field. However, the net field generated by π-electrons in non-spherical substituents is not zero. The effect of this induced field depends on the orientation of the molecule with respect to B0,...
1.1K
Chirality
25.2K
Chirality is a term that describes the lack of mirror symmetry in an object. In other words, chiral objects cannot be superposed on their mirror images. For example, our feet are chiral, as the mirror image of the left foot, the right foot, cannot be superposed on the left foot.
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
Chiral objects exhibit a sense of handedness when they interact with another chiral object. For example, our left foot can only fit in the left shoe and not in the right shoe. Achiral objects — objects that have...
25.2K
Mechanisms of Membrane-bending
2.8K
The living membranes are flexible due to their fluid mosaic nature; however, their bending into different shapes is an active process regulated by specific lipids and proteins. The membrane bending can be transient as seen in vesicles or stable for a long time as in microvilli. Cells regulate the size, location, and duration of the membrane curvature.
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
Membrane bending can happen due to intrinsic changes in lipid composition or extrinsic association with different proteins. The proteins involved...
2.8K
Diamagnetism
2.5K
Materials consisting of paired electrons have zero net magnetic moments. However, when these materials are placed under an external magnetic field, the moments opposite to the field are induced. Such materials are called diamagnets. Diamagnetism is the response of the diamagnets when placed in an external magnetic field.
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
2.5K
Divergence and Curl of Magnetic Field
3.2K
The magnetic field due to a volume current distribution given by the Biot–Savart Law can be expressed as follows:
3.2K


