Strain-assisted current-induced magnetization reversal in magnetic tunnel junctions

A micromagnetic study with phase-field microelasticity

H. B. Huang, Jiamian Hu, T. N. Yang, X. Q. Ma, Long-qing Chen

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Effect of substrate misfit strain on current-induced in-plane magnetization reversal in CoFeB-MgO based magnetic tunnel junctions is investigated by combining micromagnetic simulations with phase-field microelasticity theory. It is found that the critical current density for in-plane magnetization reversal decreases dramatically with an increasing substrate strain, since the effective elastic field can drag the magnetization to one of the four in-plane diagonal directions. A potential strain-assisted multilevel bit spin transfer magnetization switching device using substrate misfit strain is also proposed.

Original languageEnglish (US)
Article number122407
JournalApplied Physics Letters
Volume105
Issue number12
DOIs
StatePublished - Sep 22 2014

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tunnel junctions
magnetization
drag
critical current
current density
simulation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "Effect of substrate misfit strain on current-induced in-plane magnetization reversal in CoFeB-MgO based magnetic tunnel junctions is investigated by combining micromagnetic simulations with phase-field microelasticity theory. It is found that the critical current density for in-plane magnetization reversal decreases dramatically with an increasing substrate strain, since the effective elastic field can drag the magnetization to one of the four in-plane diagonal directions. A potential strain-assisted multilevel bit spin transfer magnetization switching device using substrate misfit strain is also proposed.",
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Strain-assisted current-induced magnetization reversal in magnetic tunnel junctions : A micromagnetic study with phase-field microelasticity. / Huang, H. B.; Hu, Jiamian; Yang, T. N.; Ma, X. Q.; Chen, Long-qing.

In: Applied Physics Letters, Vol. 105, No. 12, 122407, 22.09.2014.

Research output: Contribution to journalArticle

TY - JOUR

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T2 - A micromagnetic study with phase-field microelasticity

AU - Huang, H. B.

AU - Hu, Jiamian

AU - Yang, T. N.

AU - Ma, X. Q.

AU - Chen, Long-qing

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AB - Effect of substrate misfit strain on current-induced in-plane magnetization reversal in CoFeB-MgO based magnetic tunnel junctions is investigated by combining micromagnetic simulations with phase-field microelasticity theory. It is found that the critical current density for in-plane magnetization reversal decreases dramatically with an increasing substrate strain, since the effective elastic field can drag the magnetization to one of the four in-plane diagonal directions. A potential strain-assisted multilevel bit spin transfer magnetization switching device using substrate misfit strain is also proposed.

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