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Creation and annihilation of non-volatile fixed magnetic skyrmions using voltage control of magnetic anisotropy
Nature Electronics ( IF 34.3 ) Pub Date : 2020-06-29 , DOI: 10.1038/s41928-020-0432-x
Dhritiman Bhattacharya , Seyed Armin Razavi , Hao Wu , Bingqian Dai , Kang L. Wang , Jayasimha Atulasimha

Magnetic skyrmions are topological spin textures that could be used to create magnetic memory and logic devices. Such devices typically rely on current-controlled motion of skyrmions, but using skyrmions that are fixed in space could lead to more compact and energy-efficient devices. Here we report the manipulation of fixed magnetic skyrmions using voltage-controlled magnetic anisotropy. We show that skyrmions can be stabilized in antiferromagnet/ferromagnet/oxide heterostructure films without any external magnetic field due to an exchange bias field. The isolated skyrmions are annihilated or formed by applying voltage pulses that increase or decrease the perpendicular magnetic anisotropy, respectively. We also show that skyrmions can be created from chiral domains by increasing the perpendicular magnetic anisotropy of the system. Our experimental findings are corroborated using micromagnetic simulations.



中文翻译:

使用磁各向异性的电压控制来创建和消灭非易失性固定磁性天体

磁性天生离子是拓扑自旋纹理,可用于创建磁性存储器和逻辑设备。此类设备通常依赖于电流控制的Skyrmion的运动,但是使用固定在空间中的Skyrmion可能会导致设备更紧凑,更节能。在这里,我们报告了使用压控磁各向异性对固定磁天文离子的操纵。我们表明,反铁磁体/铁磁体/氧化物异质结构薄膜中的天体离子可以稳定,而没有由于交换偏置场引起的任何外部磁场。通过施加分别增大或减小垂直磁各向异性的电压脉冲,可以消灭或形成孤立的天体。我们还表明,可以通过增加系统的垂直磁各向异性来从手性域中创造出Skyrmion。

更新日期:2020-06-30
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