Proposal for piezoelectric-ferromagnet bilayer based microwave oscillators without any external magnetic field or spin transfer torque

Abstract

To summarize, we proposed and simulated a nanomagnetic microwave oscillator that does not require any DC or r.f. magnetic field (unlike in conventional FMR), nor any spin torque current (unlike in STNO's). The frequency of oscillation can be effectively tuned by DC voltage in the microwave domain. The fact that magnetic fields and currents are not needed can make it a much cheaper, denser and less power hungry alternative for future electromagnetic oscillator applications.