Magnons, a collective excitation of spins, enable low-dissipation information transport in magnetic insulators. Ramamoorthy Ramesh’s group has achieved a major breakthrough by demonstrating chiral spin transport in multiferroic BiFeO₃, controlled via ferroelectric polarization reversal, rather than traditional magnetic dipoles.
Their results show up to 18% modulation at room temperature, with spin torques capable of efficiently switching adjacent magnets—offering spin–torque efficiencies comparable to the spin Hall effect. By integrating spin–orbit injection, detection, and magnetoelectric control, the team demonstrated a fully functional, all-oxide, energy-scalable logic device.
This pioneering work, supported by Scanning NV data from Proteus Q, opens new possibilities for low-dissipation nanoelectronics and the future of multiferroic magnonics.
