Switching field modulation of a nanomagnet by resonant microwave spin torque

Biziere, Nicolas; Murè, E.; Ansermet, Jean-Philippe

doi:10.1016/j.jmmm.2010.06.016

Cited by 3 publications

(4 citation statements)

References 23 publications

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“…The microwave effect on the switching magnetic structures by spinpolarized current was studied in Refs. [7,8,9,10,11]. Lowering threshold value of dc current density was found in presence of a high-frequency current.…”

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confidence: 84%

“…It is seen from Eqs. (10), (11) that the torque mechanism contribution to the effects related with the alternative component of the current (K1) appears with the small factor κ and is absent when the damping is neglected.…”

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confidence: 99%

“…Let us make the Fourier transformation in Eqs. (10), (11). The equations for the Fourier components with ω frequency take the form…”

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confidence: 99%

“…( 12), (13). If one writes the equations similar to (10), (11) for such components, then components with ω and ω ± 2Ω frequencies appear in the right-hand side of the equations. Continuing this process leads to an infinite set of equations coupled via ǫ parameter of frequency dimension.…”

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confidence: 99%

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Parametric instability of a magnetic junction under modulated spin-polarized current

Épshteǐn

Zilberman

2012

Journal of Magnetism and Magnetic Materials

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The stability is analyzed of the magnetic junction collinear configurations against small fluctuations under amplitude-modulated current with CPP mode. High spin injection is assumed. Under parametric resonance conditions, with the modulation frequency twice the precession frequency, instability is possible of one, or another, or both the collinear configurations. When the dc component of the current density exceeds the instability threshold of the antiparallel configuration, the parametric instability is suppressed by nonparametric one which is induced by the dc current. The parametric instability manifests itself as lowering the threshold of the dc current density in presence of the high-frequency current, such an effect has been observed in experiments repeatedly. *

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confidence: 84%

mentioning

confidence: 99%

“…Let us make the Fourier transformation in Eqs. (10), (11). The equations for the Fourier components with ω frequency take the form…”

mentioning

confidence: 99%

mentioning

confidence: 99%

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