Large magnetocapacitance beyond 420% in epitaxial magnetic tunnel junctions with an MgAl₂O₄ barrier.

ABSTRACT: Magnetocapacitance (MC) effect has been observed in systems where both symmetries of time-reversal and space-inversion are broken, for examples, in multiferroic materials and spintronic devices. The effect has received increasing attention due to its interesting physics and the prospect of applications. Recently, a large tunnel magnetocapacitance (TMC) of 332% at room temperature was reported using MgO-based (001)-textured magnetic tunnel junctions (MTJs). Here, we report further enhancement in TMC beyond 420% at room temperature using epitaxial MTJs with an MgAl₂O₄(001) barrier with a cation-disordered spinel structure. This large TMC is partially caused by the high effective tunneling spin polarization, resulted from the excellent lattice matching between the Fe ele

SUBMITTER: Sato K 

PROVIDER: S-EPMC9110733 | biostudies-literature | 2022 May

REPOSITORIES: biostudies-literature