Strain Induced Vortex Core Switching in Planar Magnetostrictive Nanostructures

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

Abstract

© 2015 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "http://creativecommons.org/licenses/by/3.0/" Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. 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.

Citation

Ostler, T. A., Cuadrado, R., Chantrell, R. W., Rushforth, A. W., & Cavill, S. A. (2015). Strain Induced Vortex Core Switching in Planar Magnetostrictive Nanostructures. Physical Review Letters, 115(6), Article 067202. https://doi.org/10.1103/PhysRevLett.115.067202

• Journal Article Type: Article
• Acceptance Date: Aug 7, 2015
• Online Publication Date: Aug 7, 2015
• Publication Date: Aug 7, 2015
• Deposit Date: Jul 7, 2016
• Publicly Available Date: Jul 7, 2016
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 115
• Issue: 6
• Article Number: 067202
• DOI: https://doi.org/10.1103/PhysRevLett.115.067202
• Public URL: https://nottingham-repository.worktribe.com/output/759346
• Publisher URL: http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.067202
• Additional Information: Copyright 2015 by the American Physical Society