Composite Multiferroic Terahertz Emitter: Polarization Control via an Electric Field

Electrical control of conjugate degrees freedom in multiferroics provides the advantage reducing energy consumption to femto- and even attojoules per switch spintronics memory devices. This is achieved through development technologies that make it possible fabricate artificial materials with constantly improving properties. Here, we present design, physics, characteristics a composite multiferroic spintronic emitter, which electrical emitted terahertz (THz) wave polarization. The effect due magnetization high-quality magnetostrictive superlattice, ${\mathrm{Tb}\mathrm{Co}}_{2}/\mathrm{Fe}\text{\ensuremath{-}}\mathrm{Co},$ deposited on an anisotropic piezoelectric substrate. In our approach, several mechanisms are realized system simultaneously: strain-mediated coupling magnetic subsystems, operate range spin-reorientation transition THz-wave generation superlattice by optical femtosecond pulse. flexibility set parameters. We determine magnetoelectric parameter, responsible for THz polarization control. Our results offer significant fundamental insight into physics systems can be used applications multiferroicity, primarily emitters. believe findings represent decisive step towards other types