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Spin-torque nano-oscillators (STNOs) are a type of nanoscale microwave auto-oscillators utilizing spin-torque to generate magnetodynamics with great promise for applications in microwaves, magnetic memory, and neuromorphic computing. Here,…

Applied Physics · Physics 2023-03-16 Sheng Jiang , Sunjae Chung , Quang Tuan Le , Ping Kwan Johnny Wong , Wen Zhang , Johan Åkerman

The spin-transfer nano-oscillator (STNO) offers the possibility of using the transfer of spin angular momentum via spin-polarized currents to generate microwave signals. However, at present STNO microwave emission mainly relies on both…

In recent years, magnetic skyrmion-based spin-torque nano-oscillators (STNOs) attract considerable interest for their prospect in future-generation communication and spintronic technologies. However, some critical issues, which hamper their…

Mesoscale and Nanoscale Physics · Physics 2024-02-13 Qiyun Yi , Ting Han , Jinyi Jiang , Xiangjun Xing

Spin-torque nano-oscillators (STNOs) are promising nanoscale microwave sources for spintronic applications, serving as signal generators or elements in neuromorphic computing systems. In this paper, we investigate the experimental…

Other Condensed Matter · Physics 2025-11-10 Maksim Stebliy , Alex Jenkins , Luana Benetti , Ricardo Ferreira

Exchange coupling in an interfacial context is crucial for spin-torque nano oscillator (STNO) that consists of a non-magnetic spacer which is alloyed with a ferromagnetic material. Currently, investigations on the dynamics of the free layer…

Mesoscale and Nanoscale Physics · Physics 2023-07-12 R. Arun , R. Gopal , V. K. Chandrasekar , M. Lakshmanan

The spin torque oscillator (STO), where the magnetization of the fixed layer is tilted out of the film plane, is capable of strong microwave signal generation in zero magnetic field. Through numerical simulations of the…

Materials Science · Physics 2008-04-29 Yan Zhou , C. L. Zha , S. Bonetti , J. Persson , Johan Akerman

Spin transfer torque oscillators (STOs) based on magnetic tunnel junction (MTJ) devices are emerging as a possible replacement for complementary metal-oxide semiconductors for radio-frequency (RF) signal generation. Advantages include low…

Emerging Technologies · Computer Science 2017-07-04 Supriyo Maji

We demonstrate that the transient non-autonomous dynamics of a spin torque nano-oscillator (STNO) under a radio-frequency (rf) driving signal is qualitatively different from the dynamics described by the Adler model. If the external rf…

Materials Science · Physics 2015-05-14 Yan Zhou , Vasil Tiberkevich , Ezio Iacocca , Andrei Slavin , Johan Akerman

The advantage of an ultra-fast frequency-tunability of spin-torque nano-oscillators (STNOs) that have large (> 100MHz) relaxation frequency of amplitude fluctuations is exploited to realize ultra-fast wide-band time-resolved spectral…

Spin torque nano-oscillators (STNOs) hold encouraging promise for nanoscale microwave generators, modulators, and new types of intelligent computing. The nonlinearity, describing the current-induced tunability of oscillating frequency, is a…

Applied Physics · Physics 2025-05-13 Zixi Wang , Wenlong Cai , Ao Du , Zanhong Chen , Lei Zhou , Shiyang Lu , Kewen Shi , Weisheng Zhao

In this paper, a 3-terminal spin-transfer torque nano-oscillator (STNO) is studied using the concurrent spin injection of a spin-polarized tunneling current and a spin Hall current exciting the free layer into dynamic regimes beyond what is…

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

Spin torque nano oscillators (STNO) are nano-scale devices that can convert a direct current into short wave-length spin-wave excitations in a ferromagnetic layer. We show that arrays of STNO can be used to create directional spin-wave…

Mesoscale and Nanoscale Physics · Physics 2016-11-25 Ferran Macià , Frank. C. Hoppensteadt , Andrew D. Kent

As nascent nonlinear oscillators, nano-constriction spin Hall nano-oscillators (SHNOs) represent a promising potential for integration into more complicated systems such as neural networks, magnetic field sensors, and radio frequency (RF)…

Spin waves (SWs), the collective precessional motion of spins in a magnetic system, have been proposed as a promising alternative system with low-power consumption for encoding information. Spin Hall nano-oscillator (SHNO), a new-type…

Mesoscale and Nanoscale Physics · Physics 2020-12-02 Liyuan Li , Lina Chen , Ronghua Liu , Youwei Du

The use of spin transfer nano-oscillators (STNOs) to generate microwave signal in nanoscale devices have aroused tremendous and continuous research interest in recent years. Their key features are frequency tunability, nanoscale size, broad…

Mesoscale and Nanoscale Physics · Physics 2013-02-27 Zhongming Zeng , Giovanni Finocchio , Hongwen Jiang

Spin-torque nano-oscillators (STNO) are microwave auto-oscillators based on magnetic resonances having a nonlinear response with the oscillating amplitude, which provides them with a large frequency tunability including the possibility of…

Mesoscale and Nanoscale Physics · Physics 2020-11-25 Jan Albert , Ferran Macià , Joan Manel Hernàndez

The self-oscillation of the magnetization in a spin torque oscillator (STO) with a perpendicularly magnetized free layer and an in-plane magnetized pinned layer in the absence of an applied magnetic field was studied by numerically solving…

Mesoscale and Nanoscale Physics · Physics 2014-04-18 Tomohiro Taniguchi , Sumito Tsunegi , Hitoshi Kubota , Hiroshi Imamura

The magnetization dynamics of spin torque oscillator (STO) consisting of a perpendicularly magnetized free layer and an in-plane magnetized pinned layer was studied by solving the Landau-Lifshitz-Gilbert equation. We derived the analytical…

Mesoscale and Nanoscale Physics · Physics 2014-02-07 Tomohiro Taniguchi , Hiroko Arai , Hitoshi Kubota , Hiroshi Imamura

We demonstrate a novel type of spin Hall nano-oscillator (SHNO) that allows for efficient tuning of magnetic auto-oscillations over an extended range of gigahertz frequencies, using bipolar direct currents at constant magnetic fields. This…

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