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Bidirectional switching assisted by interlayer exchange coupling in asymmetric magnetic tunnel junctions

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arxiv 2001.10024 v1 pith:HFSPD5OJ submitted 2020-01-27 cond-mat.mtrl-sci cond-mat.mes-hall

D. J. P. de Sousa , P. M. Haney , D. L. Zhang , J. P. Wang , Tony Low This is my paper · ORCID
classification cond-mat.mtrl-scicond-mat.mes-hall
keywords couplingexchangeinterlayerswitchingmagneticanisotropyasymmetriceffective
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We study the combined effects of spin transfer torque, voltage modulation of interlayer exchange coupling and magnetic anisotropy on the switching behavior of perpendicular magnetic tunnel junctions (p-MTJs). In asymmetric p-MTJs, a linear-in-voltage dependence of interlayer exchange coupling enables the effective perpendicular anisotropy barrier to be lowered for both voltage polarities. This mechanism is shown to reduce the critical switching current and effective activation energy. Finally, we analyze the possibility of having switching via interlayer exchange coupling only.

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