Full 180° magnetization reversal with electric fields

J. J. Wang, J. M. Hu, J. Ma, J. X. Zhang, L. Q. Chen, C. W. Nan

Research output: Contribution to journalArticlepeer-review

60 Scopus citations

Abstract

Achieving 180° magnetization reversal with an electric field rather than a current or magnetic field is a fundamental challenge and represents a technological breakthrough towards new memory cell designs. Here we propose a mesoscale morphological engineering approach to accomplishing full 180° magnetization reversals with electric fields by utilizing both the in-plane piezostrains and magnetic shape anisotropy of a multiferroic heterostructure. Using phase-field simulations, we examined a patterned single-domain nanomagnet with four-fold magnetic axis on a ferroelectric layer with electric-field-induced uniaxial strains. We demonstrated that the uniaxial piezostrains, if non-collinear to the magnetic easy axis of the nanomagnet at certain angles, induce two successive, deterministic 90° magnetization rotations, thereby leading to full 180° magnetization reversals.

Original languageEnglish (US)
Article number7507
JournalScientific reports
Volume4
DOIs
StatePublished - Dec 16 2014

All Science Journal Classification (ASJC) codes

  • General

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