Characterization of parametrically amplified spin wave resonances in thin YIG films

被引：0
作者：
Sarmiento, Andres [1 ]
Kolokoltsev, Oleg [1 ]
Qureshi, Naser [1 ]
机构：
[1] Univ Nacl Autonoma Mexico, Inst Ciencias Aplicadas & Tecnol, Ciudad De Mexico 04510, Mexico
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2024年 / 606卷
关键词：
Parametric amplification; Spin wave resonances; Modulational instability; Quality factor; Perpendicular pumping; YTTRIUM-IRON-GARNET; INSTABILITY THRESHOLD; FERROMAGNETIC-FILMS; MAGNETOSTATIC WAVES; MAGNETIZATION; EXCITATION; MODULATION; LINEWIDTH; SPECTRUM; GROWTH;
D O I：
10.1016/j.jmmm.2024.172380
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We have experimentally shown that the perpendicular pumping geometry is optimal for parametric amplification of thermal magnons, which form Spin Wave Resonances (SWR) modes in in-plane magnetized Yttrium Iron Garnet (YIG) films. Above the parametric instability threshold, the parametric SWR spectrum exhibits a second order nonlinearity: the effect of modulational instability at Continuous Wave (CW) pumping. The parametric SWR modes possess a high quality factor, Qf= 2.0 x 106 that is two orders of magnitude more than the Q factor of the Ferromagnetic Resonance (FMR) in high quality YIG films.
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页数：9
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