Strain induced vortex core switching in planar magnetostrictive nanostructures

Ostler, T.A.; Cuadrado, R.; Chantrell, R.W.; Rushforth, A.W.; Cavill, S.A.

Abstract

The dynamics of magnetic vortex cores is of great interest because the gyrotropic mode has applications in spin torque driven magnetic microwave oscillators, and also provides a means to flip the direction of the core for use in magnetic storage devices. Here, we propose a new means of stimulating magnetization reversal of the vortex core by applying a time-varying strain gradient to planar structures of the magnetostrictive material Fe81Ga19 (Galfenol), coupled to an underlying piezoelectric layer. Using micromagnetic simulations we have shown that the vortex core state can be deterministically reversed by electric field control of the time-dependent strain-induced anisotropy.

• Journal Article Type: Article
• Publication Date: Aug 7, 2015
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 0031-9007
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 115
• Issue: 6
• APA6 Citation: Ostler, T., Cuadrado, R., Chantrell, R., Rushforth, A., & Cavill, S. (2015). Strain induced vortex core switching in planar magnetostrictive nanostructures. Physical Review Letters, 115(6), https://doi.org/10.1103/PhysRevLett.115.067202
• DOI: https://doi.org/10.1103/PhysRevLett.115.067202
• Publisher URL: http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.067202
• Copyright Statement: Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0
• Additional Information: Copyright 2015 by the American Physical Society