Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Controlled Individual Skyrmion Nucleation at Artificial Defects Formed by Ion Irradiation
Small ( IF 13.0 ) Pub Date : 2020-03-05 , DOI: 10.1002/smll.201907450 Kayla Fallon 1 , Sean Hughes 1 , Katharina Zeissler 2, 3 , William Legrand 4 , Fernando Ajejas 4 , Davide Maccariello 4 , Samuel McFadzean 1 , William Smith 1 , Damien McGrouther 1 , Sophie Collin 4 , Nicolas Reyren 4 , Vincent Cros 4 , Christopher H. Marrows 2 , Stephen McVitie 1
Small ( IF 13.0 ) Pub Date : 2020-03-05 , DOI: 10.1002/smll.201907450 Kayla Fallon 1 , Sean Hughes 1 , Katharina Zeissler 2, 3 , William Legrand 4 , Fernando Ajejas 4 , Davide Maccariello 4 , Samuel McFadzean 1 , William Smith 1 , Damien McGrouther 1 , Sophie Collin 4 , Nicolas Reyren 4 , Vincent Cros 4 , Christopher H. Marrows 2 , Stephen McVitie 1
Affiliation
|
Magnetic skyrmions are particle‐like deformations in a magnetic texture. They have great potential as information carriers in spintronic devices because of their interesting topological properties and favorable motion under spin currents. A new method of nucleating skyrmions at nanoscale defect sites, created in a controlled manner with focused ion beam irradiation, in polycrystalline magnetic multilayer samples with an interfacial Dzyaloshinskii–Moriya interaction, is reported. This new method has three notable advantages: 1) localization of nucleation; 2) stability over a larger range of external field strengths, including stability at zero field; and 3) existence of skyrmions in material systems where, prior to defect fabrication, skyrmions were not previously obtained by field cycling. Additionally, it is observed that the size of defect nucleated skyrmions is uninfluenced by the defect itself—provided that the artificial defects are controlled to be smaller than the inherent skyrmion size. All of these characteristics are expected to be useful toward the goal of realizing a skyrmion‐based spintronic device. This phenomenon is studied with a range of transmission electron microscopy techniques to probe quantitatively the magnetic behavior at the defects with applied field and correlate this with the structural impact of the defects.
中文翻译：
通过离子辐照形成的人工缺陷上的受控个体Skyrmion成核
磁性天生离子是磁性纹理中的颗粒状变形。由于它们有趣的拓扑特性和在自旋电流下的有利运动，它们在自旋电子器件中作为信息载体具有巨大的潜力。据报道，在具有界面Dzyaloshinskii-Moriya相互作用的多晶磁性多层样品中，采用聚焦离子束辐照以受控方式在纳米级缺陷位点形成了一种使天体离子成核的新方法。该新方法具有三个显着优点：1）核化的局部化；2）在更大范围的外部磁场强度上的稳定性，包括零磁场下的稳定性；3）材料系统中存在天空离子，在缺陷制造之前，先前没有通过现场循环获得天空离子。另外，可以观察到，有缺陷的有核天蝎子的尺寸不受缺陷本身的影响，只要将人工缺陷控制为小于固有的天蝎子尺寸即可。所有这些特性都有望对实现基于Skyrmion的自旋电子器件的目标有用。已通过一系列透射电子显微镜技术研究了这种现象，以利用施加的电场定量探测缺陷处的磁行为，并将其与缺陷的结构影响相关联。
更新日期：2020-04-03
中文翻译：
通过离子辐照形成的人工缺陷上的受控个体Skyrmion成核
磁性天生离子是磁性纹理中的颗粒状变形。由于它们有趣的拓扑特性和在自旋电流下的有利运动，它们在自旋电子器件中作为信息载体具有巨大的潜力。据报道，在具有界面Dzyaloshinskii-Moriya相互作用的多晶磁性多层样品中，采用聚焦离子束辐照以受控方式在纳米级缺陷位点形成了一种使天体离子成核的新方法。该新方法具有三个显着优点：1）核化的局部化；2）在更大范围的外部磁场强度上的稳定性，包括零磁场下的稳定性；3）材料系统中存在天空离子，在缺陷制造之前，先前没有通过现场循环获得天空离子。另外，可以观察到，有缺陷的有核天蝎子的尺寸不受缺陷本身的影响，只要将人工缺陷控制为小于固有的天蝎子尺寸即可。所有这些特性都有望对实现基于Skyrmion的自旋电子器件的目标有用。已通过一系列透射电子显微镜技术研究了这种现象，以利用施加的电场定量探测缺陷处的磁行为，并将其与缺陷的结构影响相关联。
京公网安备 11010802027423号