Mechanical vibration generated by electron spins

EurekAlert  July 2, 2019 Researchers in Japan fabricated a micro cantilever structure made of magnetic insulator yttrium iron garnet (YIG: Y3Fe5O12). A metallic thin wire was put on the root of the cantilever as a heater. When electrical current flows in the wire, the wire works as a generator of spin current by spin Seebeck effect and the spin current propagates into the micro cantilever. By measuring the vibration of the cantilever while injecting the spin current modulated near the resonant frequency of the micro cantilever, they confirmed that only the spin current injection of appropriate spin orientation can excite […]