Collinear Spin Current Induced by Artificial Modulation of Interfacial Symmetry.

ABSTRACT: Current induced spin-orbit torque (SOT) manipulation of magnetization is pivotal in spintronic devices. However, its application for perpendicular magnetic anisotropy magnets, crucial for high-density storage and memory devices, remains nondeterministic and inefficient. Here, a highly efficient approach is demonstrated to generate collinear spin currents by artificial modulation of interfacial symmetry, achieving 100% current-induced field-free SOT switching in CoFeB multilayers with perpendicular magnetization on stepped Al₂O₃ substrates. This field-free switching is primarily driven by the out-of-plane anti-damping SOT generated by the planar spin Hall effect (PSHE), resulting from reduced interface symmetry due to orientation-determined steps. Microscopic theoretic

SUBMITTER: Li Z 

PROVIDER: S-EPMC11578314 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature