Proximity-Coupling-Induced Significant Enhancement of Coercive Field and Curie Temperature in 2D van der Waals Heterostructures
Proximity-Coupling-Induced Significant Enhancement of Coercive Field and Curie Temperature in 2D van der Waals Heterostructures
复制标题
邻近耦合导致二维范德华异质结构中矫顽力场和居里温度的显着增强
DOI：
10.1002/adma.202002032
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发表时间：
2020
影响因子：
29.4
通讯作者：
Han Junbo
中科院分区：
文献类型：
--
作者：
Zhang Luman;Huang Xinyu;Doi Hongwei;Wang Mingshan;Cheng Hui;Tong Lei;Li Zheng;Han Xiaotao;Wang Xia;Ye Lei;Han Junbo
二维磁性由于其在自旋电子器件中的重要应用而一直是凝聚态物理研究的热点。二维磁性的一个特别有前途的方面是制造具有工程光学，电学和量子特性的二维异质结构的能力。近年来，原子厚材料中内禀铁磁性的发现为基础磁物理的研究提供了一个新的平台。与2D CrI 3和Cr2 Ge 2 Te 6绝缘体相比，巡游铁磁Fe 3GeTe 2（FGT）具有更大的固有垂直各向异性，更高的居里温度（TC）和相对更好的稳定性，是通过界面或组件工程实现永久室温铁磁性的有希望的候选者。在这里，它示出的FGT薄片的铁磁性能可以通过与FePS 3耦合调制。磁光克尔效应结果表明，由于邻近耦合效应，FGT的TC提高了30 K以上，矫顽场提高了100%左右，改变了界面处的自旋织构.这项工作表明，反铁磁/铁磁耦合是一种很有前途的方式来工程的巡回二维铁磁体的磁性，这铺平了道路，在先进的磁性自旋电子和存储器件的应用。
Magnetism in 2D has long been the focus of condensed matter physics due to its important applications in spintronic devices. A particularly promising aspect of 2D magnetism is the ability to fabricate 2D heterostructures with engineered optical, electrical, and quantum properties. Recently, the discovery of intrinsic ferromagnetisms in atomic thick materials has provided a new platform for investigations of fundamental magnetic physics. In contrast to 2D CrI3and Cr2Ge2Te6insulators, itinerant ferromagnetic Fe3GeTe2(FGT), which has a larger intrinsic perpendicular anisotropy, higher Curie temperature (TC), and relatively better stability, is a promising candidate for achieving permanent room‐temperature ferromagnetism through interface or component engineering. Here, it is shown that the ferromagnetic properties of FGT thin flakes can be modulated through coupling with a FePS3. The magneto‐optical Kerr effect results show that theTCof FGT is improved by more than 30 K and that the coercive field is increased by ≈100% due to the proximity coupling effect, which changes the spin textures of FGT at the interface. This work reveals that antiferromagnet/ferromagnet coupling is a promising way to engineer the magnetic properties of itinerant 2D ferromagnets, which paves the way for applications in advanced magnetic spintronic and memory devices.