Dynamic properties of magnetic domain walls and magnetic bubbles

Leeuw, F. H. de; Doel, R. van den; Enz, U.

doi:10.1088/0034-4885/43/6/001

Cited by 149 publications

(65 citation statements)

References 171 publications

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“…This problem has been considered in solid state physics for many years, with applications to conducting properties of materials [337][338][339][340], magnetic properties of spin glasses [341,342], to real-space glasses [343,344], amorphous alloys [345,346], and to physics of caking [347]. Disorder can also be introduced by the boundaries of finite systems [101,348] and by domain walls [349,350].…”

Section: Random Potentialsmentioning

confidence: 99%

Cold bosons in optical lattices

2009

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Basic properties of cold Bose atoms in optical lattices are reviewed. The main principles of correct self-consistent description of arbitrary systems with Bose-Einstein condensate are formulated. Theoretical methods for describing regular periodic lattices are presented. A special attention is paid to the discussion of Bose-atom properties in the frame of the boson Hubbard model. Optical lattices with arbitrary strong disorder, induced by random potentials, are treated. Possible applications of cold atoms in optical lattices are discussed, with an emphasis of their usefulness for quantum information processing and quantum computing.

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Section: Random Potentialsmentioning

confidence: 99%

Cold bosons in optical lattices

2009

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“…Typical droplet widths are of order one, hence are nanoscale excitations. Stationary droplets with rest frequencies close to zero resemble static circular bubbles, which received a great deal of attention in the past 19 . However, typical bubble sizes are much larger.…”

Section: Modelmentioning

confidence: 99%

Propagation and control of nanoscale magnetic-droplet solitons

2012

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The propagation and controlled manipulation of strongly nonlinear, two-dimensional solitonic states in a thin, anisotropic ferromagnet are theoretically demonstrated. It has been recently proposed that spin-polarized currents in a nanocontact device could be used to nucleate a stationary dissipative droplet soliton. Here, an external magnetic field is introduced to accelerate and control the propagation of the soliton in a lossy medium. Soliton perturbation theory corroborated by two-dimensional micromagnetic simulations predicts several intriguing physical effects, including the acceleration of a stationary soliton by a magnetic field gradient, the stabilization of a stationary droplet by a uniform control field in the absence of spin torque, and the ability to control the soliton's speed by use of a time-varying, spatially uniform external field. Soliton propagation distances approach 10 µm in low loss media, suggesting that droplet solitons could be viable information carriers in future spintronic applications, analogous to optical solitons in fiber optic communications.

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“…We consider temperatures above 1 • K, where classical thermal activation can be expected to apply. The magnetization dynamics are then governed by the Landau-Lifshitz-Gilbert equation [1] …”

Section: The Modelmentioning

confidence: 99%

“…The problem can be approached by stochastic methods: in the classical regime (typically at temperatures above ∼ 1 • K) the magnetization dynamics is governed by the Landau-Lifschitz-Gilbert equation [1] perturbed by weak thermal noise.…”

Section: Introductionmentioning

confidence: 99%

Magnetic reversal in nanoscopic ferromagnetic rings

2006

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We present a theory of magnetization reversal due to thermal fluctuations in thin submicron-scale rings composed of soft magnetic materials. The magnetization in such geometries is more stable against reversal than that in thin needles and other geometries, where sharp ends or edges can initiate nucleation of a reversed state. The 2D ring geometry also allows us to evaluate the effects of nonlocal magnetostatic forces. We find a 'phase transition', which should be experimentally observable, between an Arrhenius and a non-Arrhenius activation regime as magnetic field is varied in a ring of fixed size.

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Dynamic properties of magnetic domain walls and magnetic bubbles

Cited by 149 publications

References 171 publications

Cold bosons in optical lattices

Cold bosons in optical lattices

Propagation and control of nanoscale magnetic-droplet solitons

Magnetic reversal in nanoscopic ferromagnetic rings

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