Voltage-Controlled Magnonic Spin Tunneling Junction

Abstract

We theoretically investigate the effective exchange interaction, $J_{\mathrm{eff}}$, mediated by conductive electrons within a nonmagnetic metal spacer, in the presence of a bias voltage, sandwiched by two ferromagnetic insulators. On the basis of the tight-binding model, we show the voltage and spacer thickness dependences of $J_{\mathrm{eff}}$, and its contorollability is demonstrated. We also propose a new magnonic device with the functions of both field effect transistor and non-volatile memory.

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