Mg_(0.3)Fe_(2.7)GeTe_(2)单晶的磁性及霍尔效应研究  

Magnetic Properties and Anomalous Hall Effect in Mg_(0.3)Fe_(2.7)GeTe_(2)

作　　者：蒋雷 王义炎 孙学峰 梁慧 JIANG Lei;WANG Yiyan;SUN Xuefeng;LIANG Hui(Institute of Physical Science and Information Technology,Anhui University,Hefei 230601;Department of Physics,University of Science and Technology of China,Hefei 230026)

机构地区：[1]安徽大学物质科学与信息技术研究院,合肥230601 [2]中国科学技术大学物理系,合肥230026

出　　处：《低温物理学报》2024年第1期12-17,共6页Low Temperature Physical Letters

基　　金：国家自然科学基金(批准号:52102333,12104011)资助的课题。

摘　　要：Fe_(3)GeTe_(2)是一种具有稳定长程磁有序的准二维范德瓦尔斯磁性材料,范德瓦尔斯材料的稳定性和可调性使其在自旋电子器件的应用方面具有巨大潜力.本文用助熔剂法生长了Mg原子掺杂Fe_(2)位的Mg_(0.3)Fe_(2.7)GeTe_(2)单晶样品,并对Mg掺杂Fe_(3)GeTe_(2)的结构、磁性和输运性质的影响进行了研究.磁性数据表明Mg掺杂后铁磁转变温度不变,但样品的饱和磁矩减小.输运性质的测量中观察到各向异性的反常霍尔效应,与Fe_(3)GeTe_(2)相比,Mg掺杂后的反常霍尔电阻率减小,同时各向异性发生了变化.Fe_(3)GeTe_(2)is a quasi-2D van der Waals material that exhibits stable long range magnetic order.Van der Waals magnetic materials have promising potential for spintronic devices due to the stability and tunability in magnetic order.The hexagonal Mg_(0.3)Fe_(2.7)GeTe_(2)single crystal was grown by self-flux method.We have systematically studied the effect of Mg doping on Fe_(3)GeTe_(2)including the crystal structure,magnetic properties and Hall effect.The magnetism data shows that the doping of Mg element decreases the saturated magnetic moments.Measurements of the transport properties reveal the anisotropic anomalous Hall effect.Mg doping results in a modification of the value and anistotropy of Hall resistivity.

关 键 词：Fe_(3)GeTe_(2) 掺杂 磁性 反常霍尔效应 

分 类 号：O469[理学—凝聚态物理]