The dependence of the auto-oscillation frequency of parametric spin waves on the pumping power and inter mode interaction strengths
| العنوان: | The dependence of the auto-oscillation frequency of parametric spin waves on the pumping power and inter mode interaction strengths |
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| المؤلفون: | Steven R. Bishop, I. Laulicht, Eli Sloutskin |
| المصدر: | physica status solidi (b). 236:502-506 |
| بيانات النشر: | Wiley, 2003. |
| سنة النشر: | 2003 |
| مصطلحات موضوعية: | Steady state, Amplitude, Condensed matter physics, Chemistry, Spin wave, Oscillation, Atomic physics, Condensed Matter Physics, Constant (mathematics), Power law, Excitation, Electronic, Optical and Magnetic Materials, Parametric statistics |
| الوصف: | Computer simulations of spin waves parametric excitations are carried out in the framework of the two modes model. The dependence of the auto-oscillation (AO) frequency, f, on the pumping amplitude h is investigated. The results support the expression of Lvov et al. for this dependence in cases when the parametric excitation threshold, h th is very close to the auto-oscillation threshold h osc . In cases when h osc is considerably larger than h th , a much better fit is obtained to a slightly modified expression: f = f 0 + B([h/h osc ] 2 -1) 0.5 where f 0 is the onset frequency and B is a constant. Support is given to the idea of Lvov et al. that auto oscillation evolves from an oscillation that is damped below h osc and becomes self sustained at h osc . We find that τ CO , the decay time of AO below h osc exhibits a critical slowing down power law: τ CO α (1 - h/h osc ) -2.2 . The dependence of f on the inter mode interaction strengths when h is constant, satisfies the expression: f = D + C/(E + 2T 11 + S 11 + 2T 12 + S 12 ) where D, C, and E are constants and T 11 , T 12 , S 11 , and S 12 are the inter mode interaction strengths. This result supports the conjecture that the dependence of the auto-oscillation frequency on the physical parameters is very similar to that of N 0 , the steady state value of the total number of parametric excitations. |
| تدمد: | 1521-3951 0370-1972 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::edc8e921c40e7fd6def9be7692ff86fe https://doi.org/10.1002/pssb.200301714 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........edc8e921c40e7fd6def9be7692ff86fe |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15213951 03701972 |
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