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

M. Jaafar; R. Yanes; D. Perez De Lara; O. Chubykalo-Fesenko; A. Asenjo; E. M. Gonzalez; J. V. Anguita; M. Vazquez; J. L. Vicent

doi:10.1103/PhysRevB.81.054439

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

M. Jaafar^*, R. Yanes, D. Perez De Lara, O. Chubykalo-Fesenko, A. Asenjo, E. M. Gonzalez, J. V. Anguita, M. Vazquez, J. L. Vicent

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

79 Scopus citations

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.

Original language	English
Article number	054439
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.81.054439
State	Published - 24 Feb 2010
Externally published	Yes

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title = "Control of the chirality and polarity of magnetic vortices in triangular nanodots",

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.",

author = "M. Jaafar and R. Yanes and {Perez De Lara}, D. and O. Chubykalo-Fesenko and A. Asenjo and Gonzalez, {E. M.} and Anguita, {J. V.} and M. Vazquez and Vicent, {J. L.}",

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doi = "10.1103/PhysRevB.81.054439",

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Control of the chirality and polarity of magnetic vortices in triangular nanodots. / Jaafar, M.; Yanes, R.; Perez De Lara, D.; Chubykalo-Fesenko, O.; Asenjo, A.; Gonzalez, E. M.; Anguita, J. V.; Vazquez, M.; Vicent, J. L.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 81, No. 5, 054439, 24.02.2010.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Control of the chirality and polarity of magnetic vortices in triangular nanodots

AU - Jaafar, M.

AU - Yanes, R.

AU - Perez De Lara, D.

AU - Chubykalo-Fesenko, O.

AU - Asenjo, A.

AU - Gonzalez, E. M.

AU - Anguita, J. V.

AU - Vazquez, M.

AU - Vicent, J. L.

PY - 2010/2/24

Y1 - 2010/2/24

N2 - 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.

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

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