Deterministic Magnetization Switching via Tunable Noncollinear Spin Configurations in Canted Magnets.
Deterministic Magnetization Switching via Tunable Noncollinear Spin Configurations in Canted Magnets.
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DOI：
10.1021/acs.nanolett.3c01192
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发表时间：
2023-06
期刊：
影响因子：
10.8
通讯作者：
P. Dou;Jingyan Zhang;Yaqin Guo;T. Zhu;Jia Luo;G. Zhao;He Huang;G. Yu;Yunchi Zhao
中科院分区：
文献类型：
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作者：
P. Dou;Jingyan Zhang;Yaqin Guo;T. Zhu;Jia Luo;G. Zhao;He Huang;G. Yu;Yunchi Zhao
自旋转位扭矩 (SOT) 驱动的磁化开关已广泛用于编码高效节能的存储器和逻辑。然而，需要在磁场下打破对称性才能实现具有垂直磁各向异性（PMA）的合成反铁磁体的确定性切换，这限制了它们的潜在应用。在此，我们报告了具有垂直磁不平衡的反铁磁Co/Ir/Co三层中的所有电控磁化翻转。此外，可以通过优化Ir厚度来反转开关极性。通过使用偏振中子反射（PNR）测量，在Co/Ir/Co三层中观察到倾斜的非共线自旋构型，这是由磁不均匀性竞争引起的。此外，微磁模拟证明的不对称畴壁是由于引入不平衡磁性而导致的，从而导致Co/Ir/Co三层中的确定性磁化强度切换。我们的研究结果强调了通过可调谐自旋配置实现电控磁性的一条有前途的途径，提高了我们对物理机制的理解，并显着促进了自旋电子器件的工业应用。
Spin obit torque (SOT) driven magnetization switching has been used widely for encoding consumption-efficient memory and logic. However, symmetry breaking under a magnetic field is required to realize the deterministic switching in synthetic antiferromagnets with perpendicular magnetic anisotropy (PMA), which limits their potential applications. Herein, we report all electric-controlled magnetization switching in the antiferromagnetic Co/Ir/Co trilayers with vertical magnetic imbalance. Besides, the switching polarity could be reversed by optimizing the Ir thickness. By using the polarized neutron reflection (PNR) measurements, the canted noncollinear spin configuration was observed in Co/Ir/Co trilayers, which results from the competition of magnetic inhomogeneity. In addition, the asymmetric domain walls demonstrated by micromagnetic simulations result from introducing imbalance magnetism, leading to the deterministic magnetization switching in Co/Ir/Co trilayers. Our findings highlight a promising route to electric-controlled magnetism via tunable spin configuration, improve our understanding of physical mechanisms, and significantly promote industrial applications in spintronic devices.