Deterministic and non-volatile switching of all-van der Waals spin-orbit torque system above room temperature without external magnetic fields
arxiv(2023)
摘要
Two-dimensional van der Waals (vdW) magnetic materials hold promise for the
development of high-density, energy-efficient spintronic devices for memory and
computation. Recent breakthroughs in material discoveries and spin-orbit torque
(SOT) control of vdW ferromagnets have opened a path for integration of vdW
magnets in commercial spintronic devices. However, a solution for field-free
electric control of perpendicular magnetic anisotropy (PMA) vdW magnets at room
temperatures, essential for building compact and thermally stable spintronic
devices, is still missing. Here, we report the first demonstration of
field-free deterministic and non-volatile switching of a PMA vdW ferromagnet,
Fe_3GaTe_2 above room temperature (up to 320 K). We use the unconventional
out-of-plane anti-damping torque from an adjacent WTe_2 layer to enable such
switching with a low current density of 2.23 × 10^6 A/cm^2. This study
exemplifies the efficacy of low-symmetry vdW materials for spin-orbit torque
control of vdW ferromagnets and provides an all-vdW solution for the next
generation of scalable and energy-efficient spintronic devices.
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