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使用磁传输测量,在去皮的Fe₃GeTe₂中探测反铁磁性

Stasiu T Chyczewski¹, Ji Shi¹, Hanwool Lee¹

¹Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA. stasiuc2@illinois.edu.

|August 15, 2023

概括

范德瓦尔斯Fe3GeTe2 (FGT) 磁铁表现出复杂的磁性相,包括预测的反铁磁性状态低于150 K.磁铁传输测量显示了FGT/h-BN异构结构中铁磁性和反铁磁性排序的混合.

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:

Fe3GeTe2 (FGT) 是一个突出的二维范德瓦尔斯磁体,具有高基里温度和金属特性.
据预测,FGT具有低于150K的反铁磁相,与其铁磁顺序共存.
了解二维材料中的复杂磁相对于下一代自旋电子设备至关重要.

研究的目的:

研究Fe3GeTe2/h-BN异构结构中预测的反铁磁相的出现和影响.
通过使用先进的测量技术,探索FGT中铁磁和反铁磁排序之间的相互作用.
为了证明磁体运输测量的实用性,在2D范德瓦尔斯磁体中探测复杂的磁现象.

主要方法:

制造Fe3GeTe2 / h-BN异构结构的制造.
使用磁传输测量,包括异常的霍尔效应和磁阻.
在外平面和内平面方向使用应用磁场进行测量.
进行温度依赖性研究和现场冷却实验.

主要成果:

异常的霍尔和磁阻反应显示了复杂的温度依赖性,表明多个磁相.
在平面内的实地应用揭示了与平面拓霍尔效应一致的行为,反映了平面外的趋势.
场冷却实验表明,在低温下,和霍尔电阻存在差异,这表明由于反铁磁排序而产生类似于旋转玻璃的行为.

结论:

该研究证实了Fe3GeTe2中铁磁和反铁磁排序的共存,为其复杂的磁场景观提供了洞察力.
磁传输测量在2D范德瓦尔斯材料中的复杂磁态的表征上是有效的,即使散装磁力测量是不够的.
Fe3GeTe2/h-BN 异构结构为探索由复杂的磁顺序驱动的新型自旋电子现象提供了一个有前途的平台.

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