Enhancing the injection locking range of spin torque oscillators through mutual coupling

被引：7
|
作者：
Romera, M. [1 ]
Talatchian, P. [1 ]
Lebrun, R. [1 ]
Merazzo, K. J. [2 ,3 ]
Bortolotti, P. [1 ]
Vila, L. [2 ]
Costa, J. D. [4 ]
Ferreira, R. [4 ]
Freitas, P. P. [4 ]
Cyrille, M. -C. [2 ,3 ]
Ebels, U. [2 ]
Cros, V. [1 ]
Grollier, J. [1 ]
机构：
[1] Univ Paris Saclay, Univ Paris Sud, Unite Mixte Phys CNRS Thales, F-91767 Palaiseau, France
[2] Univ Grenoble Alpes, CEA, CNRS, SPINTEC, F-38000 Grenoble, France
[3] Univ Grenoble Alpes, CEA, LETI MINATEC, F-38000 Grenoble, France
[4] Int Iberian Nanotechnol Lab INL, P-471531 Braga, Portugal
来源：
APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 25期
关键词：
PHASE-LOCKING; MICROWAVE GENERATION; SYNCHRONIZATION;
D O I：
10.1063/1.4972346
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate how the ability of the vortex oscillation mode of a spin-torque nano-oscillator to lock to an external microwave signal is modified when it is coupled to another oscillator. We show experimentally that the mutual electrical coupling can lead to locking range enhancements of a factor 1.64. Furthermore, we analyze the evolution of the locking range as a function of the coupling strength through experiments and numerical simulations. By uncovering the mechanisms at stake in the locking range enhancement, our results will be useful for designing spin-torque nano-oscillator arrays with high sensitivities to external microwave stimuli. Published by AIP Publishing.
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页数：5
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