2009
DOI: 10.1002/qua.22253
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Magnetic vortex dynamics induced by an electrical current

Abstract: ABSTRACT:A magnetic nanoparticle in a vortex state is a promising candidate for the information storage. One bit of information corresponds to the upward or downward magnetization of the vortex core (vortex polarity). The dynamics of the magnetic vortex driven by a spin current is studied theoretically. Using a simple analytical model and numerical simulations, we show that a nondecaying vortex motion can be excited by a dc spin-polarized current, whose intensity exceeds a first threshold value as a result of … Show more

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Cited by 72 publications
(62 citation statements)
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“…corresponding to disks 1 or 2; moreover, it has been shown [20] to agree with micromagnetic simulations over a wide range of vortex core displacements. The Oersted energy from the current also has a quadratic form, but this contribution is small compared to the magnetostatic energy in Eq.…”
Section: Equation Describing Vortex Dynamicsmentioning
confidence: 69%
“…corresponding to disks 1 or 2; moreover, it has been shown [20] to agree with micromagnetic simulations over a wide range of vortex core displacements. The Oersted energy from the current also has a quadratic form, but this contribution is small compared to the magnetostatic energy in Eq.…”
Section: Equation Describing Vortex Dynamicsmentioning
confidence: 69%
“…The spin-transfer-induced gyrotropic vortex dynamics can also be described by the Thiele equation approach [21,43,46,47]:…”
Section: Thiele Analytical Approachmentioning
confidence: 99%
“…Indeed, in strongly flattened nanodots, ordering of vortex cores corresponds to Skyrmion profiles (see Ref. 54 for a review of models of the centered vortex in the nanodot). Analytical approaches to the vortex-state dynamics of Refs.…”
Section: Vortex In Circular Dot and Its Transformationsmentioning
confidence: 99%