Spin Hall nano-oscillators (SHNOs) are promising spintronic devices for microwave signal generation and neuromorphic computing. While tunable via magnetic fields and drive current, individual control in large arrays is challenging. This study demonstrates electrically gated W/CoFeB/MgO nano-constrictions where voltage-dependent perpendicular magnetic anisotropy tunes frequency and drastically modifies spin-wave localization, resulting in a giant 42% damping variation over four volts. This allows strong threshold current tuning, adding key functionality for energy-efficient control of individual SHNOs in arrays for neuromorphic computing.

Himanshu Fulara, Mohammad Zahedinejad, Roman Khymyn, Mykola Dvornik, Shunsuke Fukami, Shun Kanai, Hideo Ohno, Johan Åkerman