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

被引：37
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.
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页数：4
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共 38 条
  • [1] Numerical and analytical investigation of the synchronization of dipolarly coupled vortex spin-torque nano-oscillators
    Belanovsky, A. D.
    Locatelli, N.
    Skirdkov, P. N.
    Araujo, F. Abreu
    Zvezdin, K. A.
    Grollier, J.
    Cros, V.
    Zvezdin, A. K.
    [J]. APPLIED PHYSICS LETTERS, 2013, 103 (12)
  • [2] Phase locking dynamics of dipolarly coupled vortex-based spin transfer oscillators
    Belanovsky, A. D.
    Locatelli, N.
    Skirdkov, P. N.
    Araujo, F. Abreu
    Grollier, J.
    Zvezdin, K. A.
    Cros, V.
    Zvezdin, A. K.
    [J]. PHYSICAL REVIEW B, 2012, 85 (10)
  • [3] Spin torque oscillator frequency versus magnetic field angle: The prospect of operation beyond 65 GHz
    Bonetti, Stefano
    Muduli, Pranaba
    Mancoff, Fred
    Akerman, Johan
    [J]. APPLIED PHYSICS LETTERS, 2009, 94 (10)
  • [4] Phase locking of vortex based spin transfer oscillators to a microwave current
    Dussaux, A.
    Khvalkovskiy, A. V.
    Grollier, J.
    Cros, V.
    Fukushima, A.
    Konoto, M.
    Kubota, H.
    Yakushiji, K.
    Yuasa, S.
    Ando, K.
    Fert, A.
    [J]. APPLIED PHYSICS LETTERS, 2011, 98 (13)
  • [5] Large microwave generation from current-driven magnetic vortex oscillators in magnetic tunnel junctions
    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.
    [J]. NATURE COMMUNICATIONS, 2010, 1
  • [6] Erokhin S., ARXIV13020659
  • [7] Coupling efficiency for phase locking of a spin transfer nano-oscillator to a microwave current
    Georges, B.
    Grollier, J.
    Darques, M.
    Cros, V.
    Deranlot, C.
    Marcilhac, B.
    Faini, G.
    Fert, A.
    [J]. PHYSICAL REVIEW LETTERS, 2008, 101 (01)
  • [8] Grimaldi E., ARXIV13116299
  • [9] Synchronization of spin-transfer oscillators driven by stimulated microwave currents
    Grollier, J
    Cros, V
    Fert, A
    [J]. 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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