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.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Wang JJ,Hu JM,Ma J,Zhang JX,Chen LQ,Nan CWdoi
10.1038/srep07507subject
Has Abstractpub_date
2014-12-16 00:00:00pages
7507issn
2045-2322pii
srep07507journal_volume
4pub_type
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