凝聚态物理
自旋电子学
磁化
反铁磁性
霍尔效应
物理
磁致伸缩
压电
Weyl半金属
磁矩
铁磁性
半金属
磁场
量子力学
带隙
声学
作者
Muhammad Ikhlas,Sayak Dasgupta,Florian Theuss,Tomoya Higo,Shunichiro Kittaka,B. J. Ramshaw,Oleg Tchernyshyov,Clifford W. Hicks,Satoru Nakatsuji
出处
期刊:Nature Physics
[Springer Nature]
日期:2022-08-18
卷期号:18 (9): 1086-1093
被引量:26
标识
DOI:10.1038/s41567-022-01645-5
摘要
Piezomagnetism couples strain linearly to magnetic order producing magnetization. Thus, unlike magnetostriction, it enables bidirectional control of a net magnetic moment. If this effect becomes large at room temperature, it may be technologically relevant, similar to its electric analogue, piezoelectricity. To date, however, the studies of the piezomagnetic effect have been primarily restricted to antiferromagnetic (AF) insulators at cryogenic temperatures. Here we report the discovery of a large piezomagnetism in a metal at room temperature. Strikingly, by using the AF Weyl semimetal Mn$_3$Sn, known for its nearly magnetization-free anomalous Hall effect (AHE), we find that an application of small uniaxial strain of the order of 0.1 % can control both the sign and size of the AHE. Our experiment and theory show that the piezomagnetism can control the AHE distinctly from the magnetization, which will be useful for spintronics applications.
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