范德瓦尔斯在室温下的多铁体异构结构中对铁磁的非挥发性电控
Hanzhang Zhao1, Chao Yang1, Yadong Liu1
1Centre for Spintronics and Quantum Systems, State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.
Advanced materials (Deerfield Beach, Fla.)
|May 28, 2025
概括
这项研究表明,在室温下,在2D范德瓦尔斯多铁体异构结构中,对铁磁的非挥发性电控制. 这一突破为节能自旋电子设备和斯基米安操纵开辟了新的途径.
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:
- 多铁体异构结构是低功率自旋电子器件的关键,使磁场的电场控制成为可能.
- 在 2D 范德瓦尔斯 (vdW) 多铁体异构结构中实现可靠的,室温电调磁性仍然是一个挑战.
研究的目的:
- 为了证明在室温下Fe3GaTe2/CuInP2S6 vdW多铁体异构结构中铁磁性的强大且不易挥发的电控制.
- 为了研究对磁性的观察到的电调节负责的潜在物理机制.
主要方法:
- 制造Fe3GaTe2/CuInP2S6 vdW的异构结构. 在此过程中,
- 使用异常的霍尔电压测量来观察磁性歇斯底里循环调制的宏观表征.
- 使用现场磁力显微镜进行微观表征,以捕捉域进化.
- 第一个原则计算和微磁模拟,以了解Dzyaloshinskii-Moriya相互作用 (DMI) 的作用.
主要成果:
- 在环境条件下证明了铁磁性的强大,可重复和非挥发的电气控制.
- 通过电气控制观察到磁性歇斯底里循环的宏观调制和微观域的演变.
- 第一原理计算显示,铁电极化在铁磁层中显著调节DMI.
- 微磁模拟证实,极化增强的DMI导致改变的磁反转机制.
结论:
- 在VDW系统中使用室温残余铁电极化成功实现了铁磁的电调制.
- 这些发现为高能效的 skyrmion 操纵和先进的 vdW 旋转器件的工程铺平了道路.
- 这项工作克服了实现实用的室温VDW多铁器装置的重大障碍.
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