Deep sub-nanosecond reversal of vortex cores confined in a spin-wave potential well

Journal Article · Mon Mar 17 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4868725· OSTI ID:22257705

Dong, Xinwei; Wang, Zhenyu; Wang, Ruifang ^[1]

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1. Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005 (China)

A spin-wave potential well is created in a permalloy nanodisk by setting up a cylindrical cavity in the center of the sample. We then apply a single-harmonic external magnetic field perpendicular to the disk plane to switch the vortex polarity of the sample. Our micromagnetic numerical studies establish that the effective spin-wave confinement by the potential well leads to much stronger magnetization oscillation in the sample. Therefore, the vortex core can be reversed well below 200 ps and over a wide range of field frequency. Our findings present an additional efficient means for ultrafast switching of magnetic vortices.

• OSTI ID: 22257705
• Journal Information: Applied Physics Letters, Vol. 104, Issue 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
MAGNETIC FIELDS
MAGNETIZATION
NUMERICAL ANALYSIS
PERMALLOY
SPIN WAVES