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Strong variation of spin-orbit torques with relative spin relaxation rates in ferrimagnets
Lijun Zhu, Daniel C Ralph
Spin-orbit torques (SOTs) have been widely understood as an interfacial transfer of spin that is independent of the bulk properties of the magnetic layer. Here, we report that SOTs…
Anisotropic Gigahertz Antiferromagnetic Resonances of the Easy-Axis van der Waals Antiferromagnet CrSBr
Thow Min Jerald Cham, Saba Karimeddiny, Avalon H. Dismukes +3
We report measurements of antiferromagnetic resonances in the van der Waals easy-axis antiferromagnet CrSBr. The interlayer exchange field and magnetocrystalline anisotropy fields…
A puzzling insensitivity of magnon spin diffusion to the presence of 180 domain walls in a ferrimagnetic insulator
Ruofan Li, Lauren J. Riddiford, Yahong Chai +12
We present room-temperature measurements of magnon spin diffusion in epitaxial ferrimagnetic insulator MgAlFeO (MAFO) thin films near zero applied magnetic fi…
Giant bulk spin-orbit torque and efficient electrical switching in single ferrimagnetic FeTb layers with strong perpendicular magnetic anisotropy
Qianbiao Liu, Lijun Zhu, Xiyue S. Zhang +2
Efficient manipulation of antiferromagnetically coupled materials that are integration-friendly and have strong perpendicular magnetic anisotropy (PMA) is of great interest for low…
Separation of Artifacts from Spin-Torque Ferromagnetic Resonance Measurements of Spin-Orbit Torque for the Low-Symmetry van der Waals Semi-Metal ZrTe
Thow Min Cham, Saba Karimeddiny, Vishakha Gupta +2
We measure spin-orbit torque generated by exfoliated layers of the low-symmetry semi-metal ZrTe using the spin-torque ferromagnetic resonance (ST-FMR) technique. When the ZrTe$…
Lack of simple correlation between switching current density and spin-orbit torque efficiency of perpendicularly magnetized spin-current generator/ferromagnet heterostructures
Lijun Zhu, D. C. Ralph, R. A. Buhrman
Spin-orbit torque can drive electrical switching of magnetic layers. Here, we report that at least for micrometer-sized samples there is no simple correlation between the efficienc…