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



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Jaafar, M. y Yanes,, R. y Pérez de Lara, D. y Chubykalo Fesenko, O. y Asenjo, A. y González Herrera, Elvira María y Anguita, J. V. y Vazquez, V. y 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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URL Oficial: http://dx.doi.org/10.1103/PhysRevB.81.054439

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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

Palabras clave:Vortex; Nanostructures; Fabrication; Field
Materias:Ciencias > Física > Física de materiales
Ciencias > Física > Física del estado sólido
Código ID:43166
Depositado:16 Jun 2017 18:41
Última Modificación:19 Jun 2017 07:57

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