Steady-State Motion of Magnetic Domains

Thiele, A. A.

doi:10.1103/physrevlett.30.230

Cited by 1,286 publications

(1,119 citation statements)

References 6 publications

Supporting

Mentioning

1,093

Contrasting

Unclassified

Order By: Relevance

“…Figure 2 displays the response of the vortex core with CCW chirality to AC currents of varying frequency with a step size of 2.5 MHz. The theoretical amplitudes based on a harmonic oscillator model 15,17,20 match the experimental measurements well (Fig. 2c).…”

Section: Resultssupporting

confidence: 64%

“…The motion of a magnetic vortex is well described by Thiele's equation 20 , a phenomenological formula that uses a harmonic-oscillator-based approach to describe the vortex core motion X(t) = (X(t), Y(t)) as a function of time t. An extended version of the theory that includes both adiabatic and non-adiabatic spin torque contributions is given in Krüger et al 15 as…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Direct dynamic imaging of non-adiabatic spin torque effects

et al. 2012

View full text Add to dashboard Cite

spin-transfer torques offer great promise for the development of spin-based devices. The effects of spin-transfer torques are typically analysed in terms of adiabatic and non-adiabatic contributions. Currently, a comprehensive interpretation of the non-adiabatic term remains elusive, with suggestions that it may arise from universal effects related to dissipation processes in spin dynamics, while other studies indicate a strong influence from the symmetry of magnetization gradients. Here we show that enhanced magnetic imaging under dynamic excitation can be used to differentiate between non-adiabatic spin-torque and extraneous influences. We combine Lorentz microscopy with gigahertz excitations to map the orbit of a magnetic vortex core with < 5 nm resolution. Imaging of the gyrotropic motion reveals subtle changes in the ellipticity, amplitude and tilt of the orbit as the vortex is driven through resonance, providing a robust method to determine the non-adiabatic spin torque parameter β = 0.15 ± 0.02 with unprecedented precision, independent of external effects.

show abstract

Section: Resultssupporting

confidence: 64%

Section: Methodsmentioning

confidence: 99%

Direct dynamic imaging of non-adiabatic spin torque effects

et al. 2012

View full text Add to dashboard Cite

show abstract

“…One possible reason is that the r-dependence of M z (r)/M is more rapid as B is reduced, which gives the larger deviation from the continuum theory. The overall good agreement between the simulated and calculated results described above indicates that the theory developed in refs 31,32 based on Thiele's approach 33 works well in the absence of impurities.…”

Section: Discussionsupporting

confidence: 63%

“…32. Using an approach proposed by Thiele 33 , the LLG equation can be mapped onto the translational mode in the continuum limit by assuming the rigidity of spin textures during the drift motion. One obtains 31,32 GÂðv…”

Section: Discussionmentioning

confidence: 99%

Universal current-velocity relation of skyrmion motion in chiral magnets

2013

View full text Add to dashboard Cite

Current-driven motion of the magnetic domain wall in ferromagnets is attracting intense attention because of potential applications such as racetrack memory. There, the critical current density to drive the motion is B10 9 -10 12 A m À 2 . The skyrmions recently discovered in chiral magnets have much smaller critical current density of B10 5 -10 6 A m À 2 , but the microscopic mechanism is not yet explored. Here we present a numerical simulation of Landau-Lifshitz-Gilbert equation, which reveals a remarkably robust and universal currentvelocity relation of the skyrmion motion driven by the spin-transfer-torque unaffected by either impurities or nonadiabatic effect in sharp contrast to the case of domain wall or spin helix. Simulation results are analysed using a theory based on Thiele's equation, and it is concluded that this behaviour is due to the Magnus force and flexible shape-deformation of individual skyrmions and skyrmion crystal, which enable them to avoid pinning centres.

show abstract

“…The inherent link between topology and dynamics was already apparent in the early work of Thiele [1] as well as in many investigations that followed [2]. The essence of the early work is best summarized by the experimentally observed skew deflection of FM bubbles under the influence of an applied magnetic-field gradient.…”

Section: Introductionmentioning

confidence: 91%

Dynamics of Topological Magnetic Solitons

Baryakhtar¹,

Chetkin²,

Иванов³

et al. 1994

Springer Tracts in Modern Physics

159

View full text Add to dashboard Cite

A direct link between the topological complexity of magnetic media and their dynamics is established through the construction of unambiguous conservation laws for the linear and angular momenta as moments of a topological vorticity. As a consequence, the dynamics of topological magnetic solitons is shown to exhibit the characteristic features of the Hall effect of electrodynamics or the Magnus effect of fluid dynamics. The main points of this program are reviewed here for both ferromagnets and antiferromagnets, while a straightforward extension to the study of superfluids is also discussed briefly.

show abstract

Steady-State Motion of Magnetic Domains

Cited by 1,286 publications

References 6 publications

Direct dynamic imaging of non-adiabatic spin torque effects

Direct dynamic imaging of non-adiabatic spin torque effects

Universal current-velocity relation of skyrmion motion in chiral magnets

Dynamics of Topological Magnetic Solitons

Contact Info

Product

Resources

About