Perfect and robust phase-locking of a spin transfer vortex nano-oscillator to an external microwave source

被引：38

作者：

Hamadeh, A. ^{[1
]}

Locatelli, N. ^{[2
,3
]}

Naletov, V. V. ^{[1
,2
,3
,4
]}

Lebrun, R. ^{[2
,3
]}

de Loubens, G. ^{[1
]}

Grollier, J. ^{[2
,3
]}

Klein, O. ^{[1
]}

Cros, V. ^{[2
,3
]}

机构：

[1] CEA Saclay, Serv Phys Etat Condense, CNRS, URA 2464, F-91191 Gif Sur Yvette, France

[2] CNRS Thales, Unite Mixte Phys, F-91767 Palaiseau, France

[3] Univ Paris 11, F-91767 Palaiseau, France

[4] Kazan Fed Univ, Inst Phys, Kazan 420008, Russia

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 02期

关键词：

POLARIZED CURRENT; TORQUE OSCILLATOR; DRIVEN;

D O I：

10.1063/1.4862326

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We study the synchronization of the auto-oscillation signal generated by the spin transfer driven dynamics of two coupled vortices in a spin-valve nanopillar to an external source. Phase-locking to the microwave field h(rf) occurs in a range larger than 10% of the oscillator frequency for drive amplitudes of only a few Oersteds. Using synchronization at the double frequency, the generation linewidth is found to decrease by more than five orders of magnitude in the phase-locked regime (down to 1 Hz, limited by the resolution bandwidth of the spectrum analyzer) in comparison to the free running regime (140 kHz). This perfect phase-locking holds for frequency detuning as large as 2 MHz, which proves its robustness. We also analyze how the free running spectral linewidth impacts the main characteristics of the synchronization regime. (C) 2014 AIP Publishing LLC.

引用

页数：4

共 38 条

[1] Numerical and analytical investigation of the synchronization of dipolarly coupled vortex spin-torque nano-oscillators [J].

Belanovsky, A. D. ;

Locatelli, N. ;

Skirdkov, P. N. ;

Araujo, F. Abreu ;

Zvezdin, K. A. ;

Grollier, J. ;

Cros, V. ;

Zvezdin, A. K. .

APPLIED PHYSICS LETTERS, 2013, 103 (12)

[2] Phase locking dynamics of dipolarly coupled vortex-based spin transfer oscillators [J].

Belanovsky, A. D. ;

Locatelli, N. ;

Skirdkov, P. N. ;

Araujo, F. Abreu ;

Grollier, J. ;

Zvezdin, K. A. ;

Cros, V. ;

Zvezdin, A. K. .

PHYSICAL REVIEW B, 2012, 85 (10)

[3] Spin torque oscillator frequency versus magnetic field angle: The prospect of operation beyond 65 GHz [J].

Bonetti, Stefano ;

Muduli, Pranaba ;

Mancoff, Fred ;

Akerman, Johan .

APPLIED PHYSICS LETTERS, 2009, 94 (10)

[4] Phase locking of vortex based spin transfer oscillators to a microwave current [J].

Dussaux, A. ;

Khvalkovskiy, A. V. ;

Grollier, J. ;

Cros, V. ;

Fukushima, A. ;

Konoto, M. ;

Kubota, H. ;

Yakushiji, K. ;

Yuasa, S. ;

Ando, K. ;

Fert, A. .

APPLIED PHYSICS LETTERS, 2011, 98 (13)

[5] Large microwave generation from current-driven magnetic vortex oscillators in magnetic tunnel junctions [J].

Dussaux, A. ;

Georges, B. ;

Grollier, J. ;

Cros, V. ;

Khvalkovskiy, A. V. ;

Fukushima, A. ;

Konoto, M. ;

Kubota, H. ;

Yakushiji, K. ;

Yuasa, S. ;

Zvezdin, K. A. ;

Ando, K. ;

Fert, A. .

NATURE COMMUNICATIONS, 2010, 1

[6]

Erokhin S., ARXIV13020659

[7] Coupling efficiency for phase locking of a spin transfer nano-oscillator to a microwave current [J].

Georges, B. ;

Grollier, J. ;

Darques, M. ;

Cros, V. ;

Deranlot, C. ;

Marcilhac, B. ;

Faini, G. ;

Fert, A. .

PHYSICAL REVIEW LETTERS, 2008, 101 (01)

[8]

Grimaldi E., ARXIV13116299

[9] Synchronization of spin-transfer oscillators driven by stimulated microwave currents [J].

Grollier, J ;

Cros, V ;

Fert, A .

PHYSICAL REVIEW B, 2006, 73 (06)

[10]

Guslienko KY, 2008, J NANOSCI NANOTECHNO, V8, P2745, DOI 10.1166/jnn.2008.003

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