强大的磁性近距离诱导室温中的异常霍尔效应范德瓦尔斯铁磁半导体基于2D异构结构的铁磁半导体
Hao Wu1,2, Li Yang1, Gaojie Zhang1,2,3
1Center for Joining and Electronic Packaging, State Key Laboratory of Material Processing and Die & Mold Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology (HUST), Wuhan, 430074, China.
Small methods
|January 31, 2024
概括
研究人员开发了一种新的室温铁磁半导体FeCr0.5Ga1.5Se4,具有创纪录的库里温度. 这种材料可以在2D异构结构中实现强大的磁性近距离合,从而推进了自旋电子和量子设备.
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
- 这就是Spintronics.
背景情况:
- 开发高温范德瓦尔斯 (vdW) 铁磁半导体对于先进的自旋和量子设备至关重要.
- 现有的vdW铁磁铁通常只在低温下工作,阻碍了对2D拓半金属的接口研究.
研究的目的:
- 报告一个新的内在vdW分层室温铁磁半导体,FeCr0.5Ga1.5Se4 (FCGS).
- 为了研究FCGS与2D材料的接口合效应,用于自旋电子应用.
主要方法:
- 内在vdW层状铁磁半导体FCGS的合成和表征.
- 制造FCGS/石墨烯2D异构结构.
- 在异构结构中测量磁性,带隙和异常霍尔效应 (AHE).
主要成果:
- FCGS表现出室温铁磁性,其基里温度 (TC) 为370K,这是VDW铁磁半导体的记录.
- FCGS的带隙约为1.2 eV,在低温和室温下都表现出强烈的和磁化.
- FCGS/石墨烯接口促进了强大的vdW磁性近距离合,诱导了石墨烯中的铁磁传输和异常霍尔效应 (AHE).
- 石墨烯中近距离诱导的AHE保持稳定,高达400K.
结论:
- FCGS是一个创纪录的室温VDW铁磁半导体.
- FCGS/石墨烯异构表明有效的vdW磁性近距离合,使石墨烯中的铁磁传输成为可能.
- 这一发现为下一代自旋和量子设备铺平了道路,这些设备利用高温VDW铁磁.
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