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热电流驱动的拓旋转纹理转换和螺旋式q向量的切换
Fehmi Sami Yasin1, Jan Masell2,3, Kosuke Karube2
1RIKEN Center for Emergent Matter Science (CEMS), Wako, 351-0198, Japan. fehmi.yasin@riken.jp.
Nature communications
|November 5, 2023
概括
研究人员使用热电流来控制一种新材料中的磁性反斯基尔米安和斯基尔米安. 这项工作表明,抗米子在零场时具有强大的转移稳定性,为存储器设备推进了自旋电子学.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 这就是Spintronics.
背景情况:
- 磁性 skyrmions 已经使新的 spintronics 研究和内存设备开发成为可能.
- 已经发现了skyrmions的反粒子Antiskyrmions,但缺乏通过热电流控制.
- 开发用于控制反斯基尔米翁的方法对于推进自旋电子技术至关重要.
研究的目的:
- 为了研究使用热电流控制磁性skyrmions和antiskyrmions.
- 为了探索 skyrmions,antiskyrmions 和非拓气泡之间的转换动态.
- 为了确定在不同的磁性和热条件下抗米子的稳定性.
主要方法:
- 利用热电流在室温下操纵 (Fe0.63Ni0.3Pd0.07) 3P铁磁体中的磁性状态.
- 应用了温度梯度和磁场,以诱导 skyrmions,antiskyrmions 和气泡之间的转换.
- 观察了抗米子宿主材料中螺旋状态的切换.
主要成果:
- 证明了使用磁场下的温度梯度将抗米子转化为气泡,然后转化为米子.
- 在零磁场下观察到从skyrmions到antiskyrmions的单向转变.
- 在零场时展示了反斯基尔米翁的强大转移稳定性,在稳定性方面超过了斯基尔米翁.
结论:
- 热电流可以有效地驱动 skyrmions,antiskyrmions 和气泡之间的转换.
- 与 skyrmions 相比,Antiskyrmions 在零场中表现出增强的转移稳定性.
- 这项研究为控制自旋电子记忆器件中的磁性状态开辟了新的途径.
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