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Current-induced self-sustained magnetization oscillations in spin-torque nano-oscillators (STNOs) are promising candidates for ultra-agile microwave sources or detectors. While usually STNOs behave as a monochrome source, we report here…

Mesoscale and Nanoscale Physics · Physics 2022-10-19 A. Hamadeh , D. Slobodianiuk , R. Moukhader , G. Melkov , V. Borynskyi , M. Mohseni , G. Finocchio , V. Lomakin , R. Verba , G. de Loubens , P. Pirro , O. Klein

In this paper we present detailed numerical simulation studies on the synchronization of two spin-torque nanooscillators (STNO) in the quasi-1D geometry: magnetization oscillations are induced in a thin NiFe nanostripe by a spin polarized…

Mesoscale and Nanoscale Physics · Physics 2015-06-05 Dmitry V. Berkov

We report the experimental observation of mutual synchronization of magnetic nanooscillators driven by pure spin current generated by nonlocal spin injection. We show that the oscillators efficiently synchronize due to the direct spatial…

Mesoscale and Nanoscale Physics · Physics 2016-10-19 S. Urazhdin , V. E. Demidov , R. Cao , B. Divinskiy , V. Tyberkevych , A. Slavin , A. B. Rinkevich , S. O. Demokritov

We experimentally study the auto-oscillating spin-wave modes in NiFe/$\beta-$W constriction-based spin Hall nano-oscillators as a function of bias current, in-plane applied field strength, and azimuthal field angle, in the low-field range…

We demonstrate that the synchronization of an array of electrically coupled spin torque nano-oscillators (STNO) modelled by Landau-Lifshitz-Gilbert-Slonczewski (LLGS) equation can be enhanced appreciably in the presence of a common external…

Chaotic Dynamics · Physics 2015-06-22 B. Subash , V. K. Chandrasekar , M. Lakshmanan

Nano-constriction spin-Hall nano-oscillators (NC-SHNOs) are one of the most promising alternatives among the microwave spintronics devices. They can provide highly coherent and widely tuneable microwave signals and can be fabricated at low…

Mesoscale and Nanoscale Physics · Physics 2020-12-15 Corrado Carlo Maria Capriata , Sheng Jiang , Mykola Dvornik , Johan Åkerman , Bengt Gunnar Malm

Due to their nonlinear properties, spin transfer nano-oscillators can easily adapt their frequency to external stimuli. This makes them interesting model systems to study the effects of synchronization and brings some opportunities to…

Spin torque nano-oscillators (STNO) are nanoscale devices with wide band frequency tunability. Their multifunctional RF properties are well suited to define novel schemes for wireless communications that use basic protocols for data…

Applied Physics · Physics 2021-09-01 A. Litvinenko , P. Sethi , C. Murapaka , A. Jenkins , V. Cros , P. Bortolotti , R. Ferreria , B. Dieny , U. Ebels

Nano-constriction based spin Hall nano-oscillators (SHNOs) are at the forefront of spintronics research for emerging technological applications such as oscillator-based neuromorphic computing and Ising Machines. However, their…

Considering an array of spin torque transfer nano oscillators (STNOs), we have investigated the synchronization property of the system under the action of a common periodically driven applied external magnetic field by numerically analyzing…

Chaotic Dynamics · Physics 2014-06-17 B. Subash , V. K. Chandrasekar , M. Lakshmanan

An array of spin torque oscillators (STOs) for practical applications such as pattern recognition was recently proposed, where several STOs are connected by a common nonmagnet. In this structure, in addition to the electric and/or magnetic…

Mesoscale and Nanoscale Physics · Physics 2019-01-24 Tomohiro Taniguchi

We propose a novel concept of obtaining oscillations with frequencies in very-high frequency (VHF) and ultra-high frequency (UHF) bands. A traditional spin torque nano-oscillator (STNO) consists of at least one pinned layer (PL) and one…

Mesoscale and Nanoscale Physics · Physics 2017-06-05 Gaurav Gupta , Zhifeng Zhu , Gengchiau Liang

Spin Hall nano oscillators (SHNOs) have shown applications in unconventional computing schemes and broadband frequency generation in the presence of applied external magnetic field. However, under field-free conditions, the oscillation…

Applied Physics · Physics 2023-07-25 Ayush K Gupta , Sourabh Manna , Rajdeep Singh Rawat , Rohit Medwal

Multiple neuromorphic applications require the tuning of two or more devices to a common signal. Various types of neuromorphic computation can be realized using spintronic oscillators, where the DC current induces magnetization precession,…

Spin torque oscillators placed onto a nonmagnetic heavy metal show synchronized auto-oscillations due to the coupling originating from spin Hall magnetoresistance effect. Here, we study a system having two spin torque oscillators under the…

Mesoscale and Nanoscale Physics · Physics 2017-10-26 Tomohiro Taniguchi

This paper predicts the possibility to achieve synchronization (via injection locking to a microwave current) of spin-transfer torque oscillators based on hybrid spin-valves composed by two free layers and two perpendicular polarizers at…

Materials Science · Physics 2015-06-15 Mario Carpentieri , Takahiro Moriyama , Bruno Azzerboni , Giovanni Finocchio

Second harmonic injection (SHI) has emerged as a critical mechanism in enabling networks of coupled oscillators to function as Oscillator Ising Machines (OIMs), capable of minimizing the Ising Hamiltonian. While SHI facilitates phase…

Computational Physics · Physics 2025-08-27 Malihe Farasat , E. M. H. E. B. Ekanayake , Nikhil Shukla

The dynamics of the magnetization of the free layer in a spin-torque nano oscillator (STNO) influenced by a noncollinear alignment between the magnetizations of the free and pinned layers due to an interlayer exchange coupling has been…

Applied Physics · Physics 2022-09-14 R. Arun , R. Gopal , V. K. Chandrasekar , M. Lakshmanan

Spin-torque nano-oscillators can emulate neurons at the nanoscale. Recent works show that the non-linearity of their oscillation amplitude can be leveraged to achieve waveform classification for an input signal encoded in the amplitude of…

Dynamics of coupled spin-torque oscillators can be exploited for non-Boolean information processing. However, the feasibility of coupling large number of STOs with energy-efficiency and sufficient robustness towards parameter-variation and…

Disordered Systems and Neural Networks · Physics 2013-09-16 Mrigank Sharad , Deliang Fan , Karthik Yogendra , Kaushik Roy