Analytical Treatment of Nonlinear Ferromagnetic Resonance in Nanomagnets

被引：8
|
作者：
d'Aquino, M. [1 ]
Quercia, A. [2 ]
Scalera, V. [2 ]
Perna, S. [2 ]
Bertotti, G. [3 ]
Mayergoyz, I. D. [4 ]
Serpico, C. [2 ]
机构：
[1] Univ Naples Parthenope, Engn Dept, I-80143 Naples, Italy
[2] Univ Naples Federico II, Dept Elect Engn & ICT, I-80125 Naples, Italy
[3] Ist Nazl Ric Metrol, I-10135 Turin, Italy
[4] Univ Maryland, ECE Dept, College Pk, MD 20742 USA
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2017年 / 53卷 / 11期
关键词：
Bifurcations; ferromagnetic resonance (FMR); foldover; magnetization dynamics; nonlinear system theory; MAGNETIZATION; FOLDOVER; FILMS; YIG;
D O I：
10.1109/TMAG.2017.2702641
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We study magnetization oscillations in a uniformly magnetized nanomagnet driven by ac excitations (external fields and injected currents) when the frequency of excitation is close to ferromagnetic resonance frequency. By using separation of time scale and the averaging technique, we derive dynamical equations, which can be studied by the methods of dynamical systems theory. This leads to an analytical description of nonlinear frequency response and to the analysis of relevant bifurcation phenomena. The theoretical results are compared with numerical simulations.
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页数：5
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