2005
DOI: 10.1103/physrevb.72.094401
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Magnetization precession due to a spin-polarized current in a thin nanoelement: Numerical simulation study

Abstract: In this paper a detailed numerical study (in frames of the Slonczewski formalism) of magnetization oscillations driven by a spin-polarized current through a thin elliptical nanoelement is presented. We show that a sophisticated micromagnetic model, where a polycrystalline structure of a nanoelement is taken into account, can explain qualitatively all most important features of the magnetization oscillation spectra recently observed experimentally (S.I. Kiselev et al., Nature, 425, 380 (2003)), namely: existenc… Show more

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Cited by 68 publications
(96 citation statements)
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“…Initial micromagnetic simulations have been performed in an attempt too account for the possibility of spatially non-uniform magnetizations in spin-transfer devices. [21][22][23][24] However, for the cases analyzed, non-uniformities have thus far led to much broader, not narrower, linewidths. It is possible that the simulations might be improved by including recently-proposed mechanisms whereby different regions of a nanomagnet interact through feedback mediated by the current.…”
Section: Data and Analysismentioning
confidence: 99%
“…Initial micromagnetic simulations have been performed in an attempt too account for the possibility of spatially non-uniform magnetizations in spin-transfer devices. [21][22][23][24] However, for the cases analyzed, non-uniformities have thus far led to much broader, not narrower, linewidths. It is possible that the simulations might be improved by including recently-proposed mechanisms whereby different regions of a nanomagnet interact through feedback mediated by the current.…”
Section: Data and Analysismentioning
confidence: 99%
“…An example of such an analysis can be found in [42], where spin-torque induced (STI) precession in a square element with thickness h = 2.5 nm and typical magnetic parameters 2 (M S 1000 G, A = 2 10 -6 erg/cm) was studied. It has been shown than the magnetization configuration during STI precession significantly deviates from single-domain behaviour already for lateral sizes as small as L = 30 -40 nm.…”
Section: Iii2 Critical Sizes For the Validity Of The Macrospin Apprmentioning
confidence: 99%
“…STT can be described by the Slonczewski's model, which takes into account the interface spin-flip scattering effect. STT versus θ is described by (9), and Gilbert damping torque is proportional to the function sin θ [53,54]. They are plotted in Figure 8, where the current density is 9.0 × 10 7 A/cm 2 , and the perpendicular external magnetic field of 0.10M s is applied.…”
Section: Discussionmentioning
confidence: 99%
“…It is impossible for the magnetization dynamics to have a steady precessional state at θ = 70 • because micromagnetic simulation divides the pillar into many cell grids and the magnetization in each domain will precess around the local effective field. It is different from the macrospin model which describes the magnetic particle as a macroscopic magnetic moment [47,52,53].…”
Section: Discussionmentioning
confidence: 99%