Asymmetric behavior of current-induced magnetization switching in a magnetic tunnel junction: Non-equilibrium first-principles calculations

Masaaki Araidai, Takahiro Yamamoto, Kenji Shiraishi

Research output: Contribution to journalArticlepeer-review

Abstract

We investigated the microscopic mechanisms of current-induced magnetization switching (CIMS) in an Fe/MgO(001)/Fe/Ta magnetic tunnel junction using non-equilibrium first-principles calculations. We found that the change in the magnetization configuration from antiparallel (AP) to parallel (P) can be realized with a lower electrical power than that from P to AP. From detailed analyses of the density of states subject to a finite bias voltage, we clarified that the asymmetric behavior originates from the difference in the electron scattering processes between switching directions.

Original languageEnglish
Article number045202
JournalApplied Physics Express
Volume7
Issue number4
DOIs
Publication statusPublished - Apr 2014

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