Alteration in spin transport of a modified magnetic tunnel junction due to resonant tunneling

Abstract

This study explores potential improvement in the efficiency of traditional Magnetic Tunnel Junctions (MTJ) through utilisation of an altered double MTJ with a non-magnetic metalllic spacer (tungsten) for resonant tunneling. This structure provides an advantage over double MTJs with a ferromagnetic middle by enhancing the strength of resonant tunneling. Using the non-equilibrium Green’s function formalism, we are able to calculate and remark upon the conductivity of three different configurations of this structure with varying spacer width. By implementing this novel configuration, we observe a significant increase in the Tunnel Magne toresistance (TMR) with minimal changes in the tungsten layer width.