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Jaafar, M. and Yanes,, R. and Pérez de Lara, D. and Chubykalo Fesenko, O. and Asenjo, A. and González Herrera, Elvira María and Anguita, J. V. and Vazquez, V. and Vicent López, José Luis (2010) Control of the chirality and polarity of magnetic vortices in triangular nanodots. Physical review B, 81 (5). ISSN 1098-0121
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Official URL: http://dx.doi.org/10.1103/PhysRevB.81.054439
Abstract
Magnetic vortex dynamics in lithographically prepared nanodots is currently a subject of intensive research, particularly after recent demonstration that the vortex polarity can be controlled by in-plane magnetic field. This has stimulated the proposals of nonvolatile vortex magnetic random access memories. In this work, we demonstrate that triangular nanodots offer a real alternative where vortex chirality, in addition to polarity, can be controlled. In the static regime, we show that vortex chirality can be tailored by applying in-plane magnetic field, which is experimentally imaged by means of variable-field magnetic force microscopy. In addition, the polarity can be also controlled by applying a suitable out-of-plane magnetic field component. The experiment and simulations show that to control the vortex polarity, the out- of-plane field component, in this particular case, should be higher than the in-plane nucleation field. Micromagnetic simulations in the dynamical regime show that the magnetic vortex polarity can be changed with short-duration magnetic field pulses, while longer pulses change the vortex chirality.
Item Type: | Article |
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Additional Information: | ©2010 The American Physical Society. |
Uncontrolled Keywords: | Vortex; Nanostructures; Fabrication; Field |
Subjects: | Sciences > Physics > Materials Sciences > Physics > Solid state physics |
ID Code: | 43166 |
Deposited On: | 16 Jun 2017 18:41 |
Last Modified: | 19 Jun 2017 07:57 |
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