Electric-field-driven magnetization reversal in square-shaped nanomagnet-based multiferroic heterostructure

Ren Ci Peng, J. J. Wang, Jia Mian Hu, Long Qing Chen, Ce Wen Nan

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Based on phase field modeling and thermodynamic analysis, purely electric-field-driven magnetization reversal was shown to be possible in a multiferroic heterostructure of a square-shaped amorphous Co40Fe40B20 nanomagnet on top of a ferroelectric layer through electrostrain. The reversal is made possible by engineering the mutual interactions among the built-in uniaxial magnetic anisotropy, the geometry-dependent magnetic configuration anisotropy, and the magnetoelastic anisotropy. Particularly, the incorporation of the built-in uniaxial anisotropy made it possible to reverse magnetization with one single unipolar electrostrain pulse, which is simpler than previous designs involving the use of bipolar electrostrains and may alleviate ferroelectric fatigue. Critical conditions for triggering the magnetization reversal are identified.

Original languageEnglish (US)
Article number142901
JournalApplied Physics Letters
Issue number14
StatePublished - Apr 6 2015

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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