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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…

应用物理 · 物理学 2021-09-01 A. Litvinenko , P. Sethi , C. Murapaka , A. Jenkins , V. Cros , P. Bortolotti , R. Ferreria , B. Dieny , U. Ebels

Experiments, numerical simulations and an analytic model were developed to elucidate the effects of noise in the synchronized state of a tunnel junction based spin torque nano oscillator (STNO). It is demonstrated that in the in plane…

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…

应用物理 · 物理学 2022-09-14 R. Arun , R. Gopal , V. K. Chandrasekar , M. Lakshmanan

We present a theoretical study of spin Hall phenomenon in a nanoribbon of a two-dimensional electronic system with Rashba and Dresselhaus spin-orbit coupling. We model the electronic system by a square lattice in real space. We show that…

介观与纳米尺度物理 · 物理学 2026-03-18 Mohamad Usman , Tarun Kanti Ghosh , SK Firoz Islam

The magnetic analogue of the Josephson effect can be exploited to develop a new class of nano-spin oscillators that we denote as spin superfluid Josephson oscillators. Such a device, consisting of two exchange coupled easy-plane metallic…

介观与纳米尺度物理 · 物理学 2018-07-04 Yizhou Liu , Igor Barsukov , Ilya Krivorotov , Yafis Barlas , Roger K. Lake

The development of spintronic oscillators is driven by their potential applications in radio frequency telecommunication and neuromorphic computing. In this work, we propose a spintronic oscillator based on the chiral coupling in thin…

介观与纳米尺度物理 · 物理学 2021-06-07 Zhiyang Zeng , Zhaochu Luo , Laura J. Heyderman , Joo-Von Kim , Aleš Hrabec

We investigate the synchronization phenomenon between two Spin-transfer Torque Nano-Oscillators (STNOs) of different frequencies in two pillar systems under vortex configuration detunings or driving frequencies. The oscillators' mutual…

其他凝聚态物理 · 物理学 2022-12-23 A. Hamadeh , A. Koujok , I. Medlej , P. Pirro , S. Petit

The generation, manipulation and detection of spin-polarized electrons in nanostructures define the main challenges of spin-based electronics[1]. Amongst the different approaches for spin generation and manipulation, spin-orbit coupling,…

介观与纳米尺度物理 · 物理学 2009-11-11 Sergio O. Valenzuela , M. Tinkham

Neuromorphic computing, inspired by the brain's parallel and energy-efficient processing, offers a transformative approach to artificial intelligence. In this study, we fabricated optimized spin-transfer torque nano-oscillators (STNOs) and…

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 mutual electrical…

We theoretically study the spin current and its dc noise generated between two spin-1/2 spin chains weakly coupled at a single site in the presence of an over-population of spin excitations and a temperature elevation in one subsystem…

介观与纳米尺度物理 · 物理学 2018-01-31 Joshua Aftergood , So Takei

We study nonreciprocity in spatiotemporally modulated 1D resonator chains from the perspective of equivalent 2D resonator arrays with a synthetic dimension and transverse synthetic electric and magnetic fields. The synthetic fields are…

介观与纳米尺度物理 · 物理学 2019-08-14 Christopher W. Peterson , Wladimir A. Benalcazar , Mao Lin , Taylor L. Hughes , Gaurav Bahl

We present a scanning transmission x-ray microscopy setup combined with a novel microwave synchronization scheme in order to study high frequency magnetization dynamics at synchrotron light sources. The sensitivity necessary to detect small…

This paper introduces a novel oscillator that combines the tunability of spin Hall-driven nano oscillators with the high quality factor (Q) of high overtone bulk acoustic wave resonators (HBAR), integrating both reference and tunable…

介观与纳米尺度物理 · 物理学 2018-01-22 Mustafa Mert Torunbalci , Tanay A. Gosavi , Kerem Y. Camsari , Sunil A. Bhave

A spin-torque nano-oscillator (STNO) driven by a ramped bias current can perform spectrum analysis quickly over a wide frequency bandwidth. The STNO spectrum analyzer operates by injection locking to external microwave signals and produces…

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…

介观与纳米尺度物理 · 物理学 2023-07-12 R. Arun , R. Gopal , V. K. Chandrasekar , M. Lakshmanan

We have simulated the non-linear dynamics of networks of spin-transfer oscillators. The oscillators are magnetically uncoupled but electrically connected in series. We use a modified Landau-Lifschitz- Gilbert equation to describe the motion…

材料科学 · 物理学 2009-11-11 J. Grollier , V. Cros , A. Fert

This letter studies the dynamical behavior of spin-Hall nanoscillators from a micromagnetic point of view. The model parameters have been identified by reproducing recent experimental data quantitatively. Our results indicate that a…

介观与纳米尺度物理 · 物理学 2015-06-22 A. Giordano , M. Carpentieri , A. Laudani , G. Gubbiotti , B. Azzerboni , G. Finocchio

Double layer two-dimensional electron systems at high perpendicular magnetic field are used to realize magnetic tunnel junctions in which the electrons at the Fermi level in the two layers have either parallel or anti-parallel spin…

介观与纳米尺度物理 · 物理学 2017-05-10 J. P. Eisenstein , L. N. Pfeiffer , K. W. West

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…

介观与纳米尺度物理 · 物理学 2016-11-25 Ferran Macià , Frank. C. Hoppensteadt , Andrew D. Kent