在二维Fe3GeTe2中调节门的室温铁磁
Yujun Deng1,2,3, Yijun Yu1,2,3, Yichen Song1,2,3
1State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai, China.
Nature
|October 24, 2018
概括
研究人员开发了一种新技术,以隔离二维 (2D) 铁-3--化 (Fe3GeTe2) 单层. 这种二维材料具有可调节到室温的铁磁性, 使用离子门为先进的自旋装置铺平了道路.
科学领域:
- 凝聚物质物理学
- 材料科学
- 纳米技术
背景情况:
- 纳米电子设备的进步在很大程度上依赖于材料研究,特别是用于自旋电子的磁性薄膜.
- 范德瓦尔斯晶体具有原子薄度,化学稳定性和调性,使其成为新型电子应用的前景.
- 之前的研究表明Cr2Ge2Te6和CrI3等绝缘材料在低温下具有二维 (2D) 铁磁顺序.
研究的目的:
- 为磁传输研究制造设备并隔离金属磁铁Fe3GeTe2的单层.
- 调查2DFe3GeTe2中的漫游铁磁的持久性及其磁性.
- 探索离子对2D Fe3GeTe2的铁磁过渡温度 (Tc) 的影响.
主要方法:
- 开发一种专门的设备制造技术.
- 从分层Fe3GeTe2中分离原子薄单层.
- 测量磁传输特性和离子门对Tc的影响.
主要成果:
- 证实Fe3GeTe2中的游离铁磁性持续到单层水平,呈现出平面外的磁晶异性.
- 原始Fe3GeTe2单层的铁磁过渡温度 (Tc) 与散装值 (205K) 相比被抑制.
- 离子隔离显著增强了Tc,在2D Fe3GeTe2中实现了室温铁磁性,超过了大量的Tc.
结论:
- 在2D Fe3GeTe2中可以通过离子接实现室温铁磁性.
- 在这个原子薄的范德瓦尔斯材料中, 可调节的铁磁性为电压控制的磁电子打开了道路.
- 这项研究突显了二维范德瓦尔斯磁铁在下一代自旋和电子设备中的潜力.
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