Piezoelectric Strain Control of Terahertz Spin Current

Electrical control of photogenerated terahertz (THz) spin current pulses from a spintronic emitter has been at the forefront for development scalable, cost-efficient, wideband optospintronic devices. Artificially combined ferroelectric and ferromagnet heterostructure provides potential avenue to deterministically phase THz pulse through piezoelectric strain. Here, electric field-mediated strain multiferroic is demonstrated. The reversal obtained effect small magnetic field applied opposite initial magnetization ferromagnet. strain-controlled switching thus opens door develop efficient engineered scalable on-chip spintronics