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We demonstrate an optimized fabrication process for electric field (voltage gate) controlled nano-constriction spin Hall nano-oscillators (SHNOs), achieving feature sizes of <30 nm with easy to handle ma-N 2401 e-beam lithography negative…

介观与纳米尺度物理 · 物理学 2023-01-11 Akash Kumar , Mona Rajabali , Victor Hugo González , Mohammad Zahedinejad , Afshin Houshang , Johan Åkerman

Spin Hall nano oscillators (SHNOs) are promising candidates for neuromorphic computing due to their miniaturized dimensions, non-linearity, fast dynamics, and ability to synchronize in long chains and arrays. However, tuning the individual…

应用物理 · 物理学 2024-02-02 Maha Khademi , Akash Kumar , Mona Rajabali , Saroj P. Dash , Johan Åkerman

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

We study the current tunable microwave signal properties of nano-constriction based spin Hall nano-oscillators (SHNOs) in oblique magnetic fields as a function of the nano-constriction width, $w=$~50--140 nm. The threshold current is found…

介观与纳米尺度物理 · 物理学 2020-07-15 Ahmad A. Awad , Afshin Houshang , Mohammad Zahedinejad , Roman Khymyn , Johan Åkerman

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-Hall nano-oscillators (SHNOs) are promising spintronic devices to realize current controlled GHz frequency signals in nanoscale devices for neuromorphic computing and creating Ising systems. However, traditional SHNOs -- devices based…

介观与纳米尺度物理 · 物理学 2023-03-21 Haowen Ren , Xin Yu Zheng , Sanyum Channa , Guanzhong Wu , Daisy A. O'Mahoney , Yuri Suzuki , Andrew D. Kent

Using micromagnetic simulations, we study the interplay between strongly voltage-controlled magnetic anisotropy (VCMA), $\Delta K = \pm$200 kJ/m$^3$, and gate width, $w=$ 10--400 nm, in voltage-gated W/CoFeB/MgO based nano-constriction spin…

介观与纳米尺度物理 · 物理学 2023-08-16 Victor H. González , Roman Khymyn , Himanshu Fulara , Ahmad A. Awad , Johan Åkerman

We demonstrate low-operational-current W/Co$_{20}$Fe$_{60}$B$_{20}$/MgO spin Hall nano-oscillators (SHNOs) on highly resistive silicon (HiR-Si) substrates. Thanks to a record high spin Hall angle of the $\beta$-phase W ($\theta_{SH}$ =…

应用物理 · 物理学 2018-04-18 M. Zahedinejad , H. Mazraati , H. Fulara , J. Yue , S. Jiang , A. A. Awad , J. Åkerman

Spin Hall nano-oscillators (SHNOs) utilize pure spin currents to drive local regions of magnetic films and nanostructures into auto-oscillating precession. If such regions are placed in close proximity to each other they can interact and…

While mutually interacting spin Hall nano-oscillators (SHNOs) hold great promise for wireless communication, neural networks, neuromorphic computing, and Ising machines, the highest number of synchronized SHNOs remains limited to $N$ = 64.…

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…

We experimentally study spin-Hall nano-oscillators based on [Co/Ni] multilayers with perpendicular magnetic anisotropy. We show that these devices are capable of single-frequency auto-oscillations at current densities comparable to those in…

介观与纳米尺度物理 · 物理学 2017-07-19 B. Divinskiy , V. E. Demidov , A. Kozhanov , A. B. Rinkevich , S. O. Demokritov , S. Urazhdin

Spin-orbit torque can drive auto-oscillations of propagating spin wave (PSW) modes in nano-constriction spin Hall nano-oscillators (SHNOs). These modes allow both long-range coupling and the potential of controlling its phase -- critical…

介观与纳米尺度物理 · 物理学 2025-01-10 Akash Kumar , Avinash kumar Chaurasiya , Victor H. González , Nilamani Behera , Roman Khymyn , Ahmad A. Awad , Johan Åkerman

We investigate the individual impacts of critical magnetodynamical parameters-effective magnetization and magnetic damping-on the auto-oscillation characteristics of nano-constriction-based Spin Hall Nano-Oscillators (SHNOs). Our…

介观与纳米尺度物理 · 物理学 2024-02-05 Arunima TM , Himanshu Fulara

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…

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…

应用物理 · 物理学 2023-07-25 Ayush K Gupta , Sourabh Manna , Rajdeep Singh Rawat , Rohit Medwal

We propose an asymmetric-nanoconstriction (ANC) design of spin-Hall nano-oscillators (SHNOs) and investigate mutual synchronization of a pair of such devices using micromagnetic simulations. The ANC geometry enables strong dipolar coupling…

介观与纳米尺度物理 · 物理学 2025-09-16 Roman V. Ovcharov , Roman S. Khymyn , Akash Kumar , Johan Åkerman

We study the impact of spin wave damping ($\alpha$) on the auto-oscillation properties of nano-constriction based spin Hall nano-oscillators (SHNOs). The SHNOs are based on a 5 nm Pt layer interfaced to a 5 nm Py$_{100-x-y}$Pt$_{x}$Ag$_{y}$…

介观与纳米尺度物理 · 物理学 2018-02-16 Yuli Yin , Philipp Dürrenfeld , Mykola Dvornik , Martina Ahlberg , Afshin Houshang , Ya Zhai , Johan Åkerman

Constriction-based spin Hall nano-oscillators (SHNOs) show great promise for application as highly tunable microwave sources with straightforward scalability toward large coupled networks. However, details of the magnetization dynamics…

Magnetic auto-oscillations are damping-compensated magnetization precessions. They can be generated in spin Hall nano-oscillators (SHNO) among others. Current research on these devices is dedicated to create next generation energy-efficient…

介观与纳米尺度物理 · 物理学 2024-06-25 Toni Hache , Anshu Anshu , Tetyana Shalomayeva , Rainer Stöhr , Klaus Kern , Jörg Wrachtrup , Aparajita Singha
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