4.8 Article

Deterministic Magnetization Switching via Tunable Noncollinear Spin Configurations in Canted Magnets

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NANO LETTERS
卷 23, 期 14, 页码 6449-6457

出版社

AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.3c01192

关键词

spin-orbit torque; noncollinear spin configurations; canted magnets; asymmetric domain walls

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This study reports on all electric-controlled magnetization switching in antiferromagnetic Co/Ir/Co trilayers with vertical magnetic imbalance. The switching polarity can be reversed by optimizing the Ir thickness. The polarized neutron reflection measurements reveal a canted noncollinear spin configuration in Co/Ir/Co trilayers, resulting from magnetic inhomogeneity. Micromagnetic simulations demonstrate asymmetric domain walls, caused by introduced imbalance magnetism, leading to deterministic magnetization switching in Co/Ir/Co trilayers.
Spin obit torque (SOT) driven magnetizationswitching has beenused widely for encoding consumption-efficient memory and logic. However,symmetry breaking under a magnetic field is required to realize thedeterministic switching in synthetic antiferromagnets with perpendicularmagnetic anisotropy (PMA), which limits their potential applications.Herein, we report all electric-controlled magnetization switchingin the antiferromagnetic Co/Ir/Co trilayers with vertical magneticimbalance. Besides, the switching polarity could be reversed by optimizingthe Ir thickness. By using the polarized neutron reflection (PNR)measurements, the canted noncollinear spin configuration was observedin Co/Ir/Co trilayers, which results from the competition of magneticinhomogeneity. In addition, the asymmetric domain walls demonstratedby 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 magnetismvia tunable spin configuration, improve our understanding of physicalmechanisms, and significantly promote industrial applications in spintronicdevices.

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