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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 the influence of field-like torque and the direction of the external magnetic field on a one-dimensional array of serially connected spin-torque nano oscillators, having free layers with perpendicular anisotropy, to achieve…

Mesoscale and Nanoscale Physics · Physics 2023-12-29 R. Arun , R. Gopal , V. K. Chandrasekar , M. Lakshmanan

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…

Spin-torque oscillators are strong candidates as nano-scale microwave generators and detectors. However, because of large amplitude-phase coupling (non-linearity), phase noise is enhanced over other linear auto-oscillators. One way to…

Mesoscale and Nanoscale Physics · Physics 2017-04-05 Muftah Al-Mahdawi , Yusuke Toda , Yohei Shiokawa , Masashi Sahashi

Spin waves (SWs) in magnetic nanotubes have shown interesting nonreciprocal properties in their dispersion relation, group velocity, frequency linewidth and attenuation lengths. The reported chiral effects are similar to those induced by…

Multiple neuromorphic applications require the tuning of two or more devices to a common signal. Various types of neuromorphic computation can be realized using spintronic oscillators, where the DC current induces magnetization precession,…

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…

Mesoscale and Nanoscale Physics · Physics 2017-07-19 B. Divinskiy , V. E. Demidov , A. Kozhanov , A. B. Rinkevich , S. O. Demokritov , S. Urazhdin

We study the magnetic and superconducting proximity effects in a semiconducting nanowire (NW) attached to superconducting leads and a ferromagnetic insulator (FI). We show that a sizable equilibrium spin polarization arises in the NW due to…

Mesoscale and Nanoscale Physics · Physics 2020-05-13 X. P. Zhang , V. N. Golovach , F. Giazotto , F. S. Bergeret

We theoretically demonstrate linear spin-wave nonreciprocity in a Ni80Fe20 nanostripe waveguide, based on interband magnonic transitions induced by a time-reversal and spatialinversion symmetry breaking magnetic field. An analytical…

Mesoscale and Nanoscale Physics · Physics 2015-06-16 Kai Di , Hock Siah Lim , Vanessa Li Zhang , Ser Choon Ng , Meng Hau Kuok

We perform 3D micromagnetic simulations of current-driven magnetization dynamics in nanoscale exchange biased spin-valves that take account of (i) back action of spin-transfer torque on the pinned layer, (ii) non-linear damping and (iii)…

Mesoscale and Nanoscale Physics · Physics 2009-11-13 G. Siracusano , G. Finocchio , I. N. Krivorotov , L. Torres , G. Consolo , B. Azzerboni

Efficient manipulation of spin waves (SWs) is considered as one of the promising means for encoding information with low power consumption in next generation spintronic devices. The SW Doppler shift is one important phenomenon by…

Applied Physics · Physics 2023-10-27 Shaojie Hu , Kang Wang , Tai Min , Takashi Kimura

We propose a hybrid magnonic-oscillator system based on the combination of a spin transfer auto-oscillator and a magnonic waveguide to open new perspectives for spin-wave based circuits. The system is composed of a spin transfer oscillator…

Other Condensed Matter · Physics 2022-12-23 A. Hamadeh , D. Breitbach , M. Ender , A. Koujok , M. Mohseni , F. Kohl , J. Maskill , M. Bechberger , P. Pirro

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…

Applied Physics · Physics 2023-07-25 Ayush K Gupta , Sourabh Manna , Rajdeep Singh Rawat , Rohit Medwal

In this letter, we present experimental data demonstrating spin wave interference detection using spin Hall effect (ISHE). Two coherent spin waves are excited in a yttrium-iron garnet (YIG) waveguide by continuous microwave signals. The…

Mesoscale and Nanoscale Physics · Physics 2024-06-19 Michael Balynskiy , Howard Chiang , David Gutierrez , Alexander Khitun

An SNN-junction in which the superconducting potential is a mixture between s-wave and p-wave potentials is investigated using the Usadel equation equipped with Tanaka-Nazarov boundary conditions. The article provides several ways to…

Superconductivity · Physics 2023-03-08 Tim Kokkeler , Yukio Tanaka , Alexander A. Golubov

Using newly developed quantum-classical hybrid framework, we investigate interaction between spin-polarized conduction electrons and a single spin wave (SW) coherently excited within a metallic ferromagnetic nanowire. When the nanowire…

Mesoscale and Nanoscale Physics · Physics 2020-06-08 Abhin Suresh , Utkarsh Bajpai , Branislav K. Nikolic

We study the synchronization of the auto-oscillation signal generated by the spin transfer driven dynamics of two coupled vortices in a spin-valve nanopillar to an external source. Phase-locking to the microwave field hrf occurs in a range…

Mesoscale and Nanoscale Physics · Physics 2015-06-18 A. Hamadeh , Nicolas Locatelli , V. V. Naletov , Romain Lebrun , Grégoire De Loubens , Julie Grollier , Olivier Klein , V. Cros

Using amplitude equations, we show that groups of identical nano-mechanical resonators, interacting with a common mode of a cavity microwave field, synchronize to form a single mechanical mode which couples to the cavity with a strength…

Mesoscale and Nanoscale Physics · Physics 2013-05-30 C. A. Holmes , C. P. Meaney , G. J. Milburn

Spin-Hall oscillators are promising sources of spin-wave signals for magnonics applications, and can serve as building blocks for magnonic logic in ultralow power computation devices. Here, we analytically and micromagnetically study…

The emerging field of nano-magnonics utilizes high-frequency waves of magnetization - the spin waves - for the transmission and processing of information on the nanoscale. The advent of spin-transfer torque has spurred significant advances…

Mesoscale and Nanoscale Physics · Physics 2018-07-06 Boris Divinskiy , Vladislav E. Demidov , Sergei Urazhdin , Ryan Freeman , Anatoly B. Rinkevich , Sergej O. Demokritov
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