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.

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: Jun 25, 2015
• Online Publication Date: Aug 7, 2015
• Publication Date: Aug 7, 2015
• Deposit Date: Jun 15, 2022
• Publicly Available Date: Jun 30, 2022
• 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://hull-repository.worktribe.com/output/4014618