Effect of Temperature in Hysteretic Synchronization of Magnetic Vortex Spin-Torque Nano-Oscillators

被引：3
|
作者：
d'Aquino, M. [1 ]
Perna, S. [2 ]
Quercia, A. [2 ]
Scalera, V. [2 ]
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
来源：
IEEE TRANSACTIONS ON MAGNETICS | 2017年 / 53卷 / 11期
关键词：
Hysteresis; spin-torque; synchronization; thermal fluctuations; vortex oscillator; INJECTION LOCKING; POLARIZED CURRENT; DYNAMICS; DRIVEN; MOTION;
D O I：
10.1109/TMAG.2017.2702633
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：
The synchronization of vortex spin-transfer nano-oscillators (both nanopillar and nanocontact structures) with external microwave excitations is considered. A collective variables description is used to derive an analytical reduced-order model for the vortex core dynamics, which is able to predict all the possible oscillation regimes and hysteretic transitions among them. The influence of thermal fluctuations on hysteretic synchronization is studied by full micromagnetic simulations. The numerical results are in good agreement with the theory.
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页数：5
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