Surface acoustic wave induced modulation of tunneling magnetoresistance in magnetic tunnel junctions

Dhritiman Bhattacharya, Peng Sheng, Md Ahsanul Abeed, Zhengyang Zhao, Hongshi Li, Jian Ping Wang, Supriyo Bandyopadhyay, Bin Ma, Jayasimha Atulasimha

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We show that a surface acoustic wave (SAW) applied across the terminals of a magnetic tunnel junction (MTJ) decreases both the (time-averaged) parallel and antiparallel resistances of the MTJ, with the latter decreasing much more than the former. This results in a decrease in the tunneling magnetoresistance ratio. The coercivities of the free and fixed layers of the MTJ, however, are not affected significantly, suggesting that the SAW does not cause large-angle magnetization rotation in the magnetic layers through the inverse magnetostriction (Villari) effect at the power levels used. This study sheds light on the dynamical behavior of an MTJ under periodic compressive and tensile strain.

Original languageEnglish (US)
Article number033901
JournalJournal of Applied Physics
Volume130
Issue number3
DOIs
StatePublished - Jul 21 2021

Bibliographical note

Funding Information:
This work at VCU was supported by the U.S. National Science Foundation under Grant No. CCF-1815033. The work at UMN was supported by the U.S. National Science Foundation under Grant No. CCF-1816406. Portions of this work were conducted in the Minnesota Nano Center, which was supported by the National Science Foundation through the National Nanotechnology Coordinated Infrastructure (NNCI) under Award No. ECCS-2025124.

Publisher Copyright:
© 2021 Author(s).

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