Creation and annihilation of non-volatile fixed magnetic skyrmions using voltage control of magnetic anisotropy
Creation and annihilation of non-volatile fixed magnetic skyrmions using voltage control of magnetic anisotropy
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DOI：
10.1038/s41928-020-0432-x
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发表时间：
2020-06-29
影响因子：
34.3
通讯作者：
Atulasimha, Jayasimha
中科院分区：
文献类型：
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作者：
Bhattacharya, Dhritiman;Razavi, Seyed Armin;Atulasimha, Jayasimha
磁性Skyrmions是一种拓扑自旋纹理，可用于创建磁性存储器和逻辑设备。这类设备通常依赖于电流控制的天空微子的运动，但使用固定在太空中的天空微子可能会带来更紧凑和更节能的设备。在这里，我们报告了利用压控磁各向异性来操纵固定磁天平的方法。结果表明，由于交换偏置场的作用，反铁磁/铁磁/氧化物异质结薄膜中的Skyrmions可以在没有任何外加磁场的情况下稳定下来。分别通过施加增加或减小垂直磁各向异性的电压脉冲来湮灭或形成孤立的天米子。我们还表明，通过增加系统的垂直磁各向异性，可以从手征磁区产生Skyrmions。我们的实验结果得到了微磁模拟的证实。没有任何外部磁场稳定的固定磁性天桥可以使用电场来操纵，这提供了一种可以用来制造紧凑和节能设备的方法
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.Fixed magnetic skyrmions that are stabilized without any external magnetic field can be manipulated using an electric field, providing an approach that could be used to create compact and energy-efficient devices