Control of the chirality and polarity of magnetic vortices in triangular nanodots



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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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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.

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©2010 The American Physical Society.
The authors acknowledge the financial support from the Spanish Ministerio Ciencia e Innovación through Project Nos. FIS2008-06249, MAT2007-66719-C03-01, and MAT2007-65420-C02-01, Consolider Grant Nos. CSD2007- 00010 and CS2008-023, CAM Grant Nos. S2009/MAT- 1726, S2009/MAT-1467, S-0505/ESP/0337, and 505/MAT/ 0194, Santander-UCM Grant No. GR58/08, and Fondo Social Europeo. M.J. and R.Y. wish to thank CAM and CSIC, respectively, for the financial support

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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