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Spin torque and spin Hall effect nanooscillators generate high intensity spin wave auto oscillations on the nanoscale enabling novel microwave applications in spintronics, magnonics, and neuromorphic computing. For their operation, these…

介观与纳米尺度物理 · 物理学 2019-06-19 M. Haidar , A. A. Awad , M. Dvornik , R. Khymyn , A. Houshang , J. Akerman

We investigate a W-Ta alloying route to reduce the auto-oscillation current densities and the power consumption of nano-constriction based spin Hall nano oscillators. Using spin-torque ferromagnetic resonance (ST-FMR) measurements on…

介观与纳米尺度物理 · 物理学 2023-01-11 Nilamani Behera , Himanshu Fulara , Lakhan Bainsla , Akash Kumar , Mohammad Zahedinejad , Afshin Houshang , Johan Åkerman

Ferromagnetic (FM)/heavy metal (HM) nanostructures can be used for the magnetic state readout in the proposed magneto-electric spin-orbit logic by locally injecting a spin-polarized current and measure the spin-to-charge conversion via the…

介观与纳米尺度物理 · 物理学 2021-04-14 Inge Groen , Van Tuong Pham , Naëmi Leo , Alain Marty , Luis E. Hueso , Fèlix Casanova

Spin-orbit-torque-driven auto-oscillations in spin Hall nano-oscillators (SHNOs) offer a transformative pathway toward energy-efficient, nanoscale microwave devices for next-generation neuromorphic computing and high-frequency technologies.…

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

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

Effectively manipulating magnetism in ferromagnet (FM) thin film nanostructures with an in-plane current has become feasible since the determination of a 'giant' spin Hall effect (SHE) in certain heavy metal (HM)/FM system. Recently, both…

材料科学 · 物理学 2016-06-29 Yongxi Ou , Shengjie Shi , D. C. Ralph , R. A. Buhrman

Antiferromagnetic materials promise improved performance for spintronic applications, as they are robust against external magnetic field perturbations and allow for faster magnetization dynamics compared to ferromagnets. The direct…

We report on investigation of spin Hall magnetoresistance sensor based on NiFe/AuxPt1-x bilayers. Compared to NiFe/Pt, the NiFe/AuxPt1-x sensor exhibits a much lower power consumption (reduced by about 57%), due to 80% enhancement of…

应用物理 · 物理学 2020-01-08 Yanjun Xu , Yumeng Yang , Hang Xie , Yihong Wu

Non-collinear antiferromagnets can have additional spin Hall effects due to the net chirality of their magnetic spin structure, which provides for more complex spin-transport phenomena compared to ordinary non-magnetic materials. Here we…

We develop a high-throughput method for measuring the composition dependence of magnetoresistance (MR) and spin-transfer-torque (STT) effects in current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices and report its…

材料科学 · 物理学 2024-06-12 Vineet Barwal , Hirofumi Suto , Tomohiro Taniguchi , Yuya Sakuraba

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…

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 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

Spin-Hall nano-oscillators (SHNO) are nanoscale spintronic devices that generate high-frequency (GHz) microwave signals useful for various applications such as neuromorphic computing and creating Ising systems. Recent research demonstrated…

介观与纳米尺度物理 · 物理学 2025-04-29 Robert Xi , Ya-An Lai , Andrew D. Kent

Nanoscale miniaturization has revolutionized the field of spintronics by enabling exponential growth in areal bit density. A similar leap is also expected in device speeds through successfully harnessing femtosecond magnetization dynamics.…

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…

The spin Hall effect (SHE) can generate a pure spin current by an electric current, which is promisingly used to electrically control magnetization. To reduce power consumption of this control, a giant spin Hall angle (SHA) in the SHE is…

We demonstrate that the spin Hall effect in a thin film with strong spin-orbit scattering can excite magnetic precession in an adjacent ferromagnetic film. The flow of alternating current through a Pt/NiFe bilayer generates an oscillating…

介观与纳米尺度物理 · 物理学 2015-05-20 Luqiao Liu , Takahiro Moriyama , D. C. Ralph , R. A. Buhrman

Dynamical antiferromagnets pump spins efficiently into adjacent conductors as ferromagnets. The high antiferromagnetic resonance frequencies represent a challenge for experimental detection, but magnetic fields can reduce these resonance…

介观与纳米尺度物理 · 物理学 2017-06-28 Øyvind Johansen , Arne Brataas
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