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Recently, an associative memory operation by a virtual oscillator network, consisting of a single spintronic oscillator, was examined to solve issues in conventional, real oscillators-based neural networks such as inhomogeneities between…

介观与纳米尺度物理 · 物理学 2024-04-10 Tomohiro Taniguchi , Yusuke Imai

Spin-polarized dc electric current flowing into a magnetic layer can induce precession of the magnetization at a frequency that depends on current. We show that addition of an ac current to this dc bias current results in a frequency…

其他凝聚态物理 · 物理学 2009-11-10 M. R. Pufall , W. H. Rippard , S. Kaka , T. J. Silva , S. E. Russek

Phase locking experiments on vortex based spin transfer oscillators with an external microwave current are performed. We present clear evidence of phase locking, frequency pulling, as well as fractional synchronization in this system, with…

This paper presents the first voltage-controlled MEMS oscillator (VCMO) based on a Lithium Niobate (LiNbO3) lateral overtone bulk acoustic resonator (LOBAR). The VCMO consists of a LOBAR in a closed loop with 2 amplification stages and a…

信号处理 · 电气工程与系统科学 2019-10-08 Ali Kourani , Ruochen Lu , Anming Gao , Songbin Gong

Spin Hall nano-oscillators (SHNOs) are emerging spintronic devices for microwave signal generation and oscillator based neuromorphic computing combining nano-scale footprint, fast and ultra-wide microwave frequency tunability, CMOS…

Voltage control of magnetic anisotropy (VCMA) in magnetic heterostructures is a key technology for achieving energy-efficiency electronic devices with ultralow power consumption. Here, we report the first demonstration of the VCMA effect in…

材料科学 · 物理学 2017-03-24 Zhenchao Wen , Hiroaki Sukegawa , Takeshi Seki , Takahide Kubota , Koki Takanashi , Seiji Mitani

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…

介观与纳米尺度物理 · 物理学 2020-12-02 Liyuan Li , Lina Chen , Ronghua Liu , Youwei Du

Spin transfer magnetization dynamics have led to considerable advances in Spintronics, including opportunities for new nanoscale radiofrequency devices. Among the new functionalities is the radiofrequency(rf) detection using the spin diode…

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…

Injection locking is a powerful technique for synchronization of oscillator networks and controlling the phase and frequency of individual oscillators using similar or other types of oscillators. Here, we present the first demonstration of…

光学 · 物理学 2018-05-09 Ke Huang , Mani Hossein-Zadeh

An array of spin torque nano-oscillators (STNOs), coupled by dipolar interaction and arranged on a ring, has been studied numerically and analytically. The phase patterns and locking ranges are extracted as a function of the number $N$,…

软凝聚态物质 · 物理学 2021-08-10 M. A. Castro , D. Mancilla-Almonacid , B. Dieny , S. Allende , L. D. Buda-Prejbeanu , U. Ebels

This paper presents a non-Hermitian physics-inspired voltage-controlled oscillator (VCO) topology, which is termed parity-time-symmetric topology. The VCO consists of two coupled inductor-capacitor (LC) cores with a balanced gain and loss…

新兴技术 · 计算机科学 2023-01-31 Weidong Cao , Hua Wang , Xuan Zhang

We experimentally study the dynamical modes excited by current-induced spin-orbit torque and its electrostatic gating effect in a 3-terminal planar nano-gap spin Hall nano-oscillator (SHNO) with a moderate interfacial perpendicular magnetic…

介观与纳米尺度物理 · 物理学 2023-04-12 Lina Chen , Yu Chen , Zhenyu Gao , Kaiyuan Zhou , Zui Tao , Yong Pu , Tiejun Zhou , Ronghua Liu

Virtual oscillator control is the latest control technique for grid-forming inverters. Virtual Oscillator based Controllers (VOCs) provide all the steady-state droop functionalities of conventional droop controllers and, in addition, the…

系统与控制 · 电气工程与系统科学 2022-10-07 Ritwik Ghosh , Narsa Reddy Tummuru , Bharat Singh Rajpuohit

Single-qubit gates are essential components of a universal quantum computer. Without selective addressing of individual qubits, scalable implementation of quantum algorithms is not possible. When the qubits are discrete points or regions on…

Voltage-gate assisted spin-orbit torque (VGSOT) writing scheme combines the advantages from voltage control of magnetic anisotropy (VCMA) and spin-orbit torque (SOT) effects, enabling multiple benefits for magnetic random access memory…

介观与纳米尺度物理 · 物理学 2021-06-11 Y. C. Wu , K. Garello , W. Kim , M. Gupta , M. Perumkunnil , V. Kateel , S. Couet , R. Carpenter , S. Rao , S. Van Beek , K. K. Vudya Sethu , F. Yasin , D. Crotti , G. S. Kar

The ac response of self-sustained current oscillations (SSCOs) in GaAs/AlAs superlattices (SLs) is derived based on the deformation of a limit cycle under an external ac driving force. Frequency locking into an integer fraction of the ac…

介观与纳米尺度物理 · 物理学 2009-11-10 Z. Z. Sun , H. T. He , J. N. Wang , Shi-dong Wang , X. R. Wang

Noncollinear frustrated magnets are proposed as a new class of spintronic materials with high magnetoresistance which can be controlled with relatively small applied voltages. It is demonstrated that their magnetic configuration strongly…

材料科学 · 物理学 2010-11-29 A. Kalitsov , M. Chshiev , B. Canals , C. Lacroix

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…

介观与纳米尺度物理 · 物理学 2020-12-15 Corrado Carlo Maria Capriata , Sheng Jiang , Mykola Dvornik , Johan Åkerman , Bengt Gunnar Malm

Spin waves, known for their ability to propagate without the involvement of moving charges, hold immense promise for on-chip information transfer and processing, offering a path toward post-CMOS computing technologies. This study…