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In this work, we utilize voltage controlled magnetic anisotropy (VCMA) to manipulate magnetic skyrmions that are fixed in space. Memory devices based on this strategy can potentially be of smaller footprint and better energy efficiency than…

介观与纳米尺度物理 · 物理学 2020-09-22 Dhritiman Bhattacharya , Seyed Armin Razavi , Hao Wu , Bingqian Dai , Kang L. Wang , Jayasimha Atulasimha

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…

应用物理 · 物理学 2023-10-27 Shaojie Hu , Kang Wang , Tai Min , Takashi Kimura

Virtual Oscillator (VO) control is the latest and promising control technique for grid-forming and grid-supporting inverters. VO Controllers (VOCs) provide time-domain synchronization with a connected electrical network. At the same time, a…

系统与控制 · 电气工程与系统科学 2022-03-25 Ritwik Ghosh , Narsa Reddy Tummuru , Bharat Singh Rajpuohit

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

Materials with large magnetocrystalline anisotropy and strong electric field effects are highly needed to develop new types of memory devices based on electric field control of spin orientations. Instead of using modified transition metal…

材料科学 · 物理学 2017-08-02 Xuelei Sui , Tao Hu , Jianfeng Wang , Bing-Lin Gu , Wenhui Duan , Mao-sheng Miao

We report on the injection locking of an optically levitated nanomechanical oscillator (a silica nanosphere) to resonant intensity modulations of an external optical signal. We explore the characteristic features of injection locking in…

Modulation of a spin-torque oscillator (STO) signal based on a magnetic tunnel junction (MTJ) with perpendicularly magnetized free layer is investigated. Magnetic field inductive loop was created during MTJ fabrication process, which…

New mechanism of magnetoresistance, based on tunneling-emission of spin polarized electrons from ferromagnets (FM) into semiconductors (S) and precession of electron spin in the semiconductor layer under external magnetic field, is…

材料科学 · 物理学 2009-11-10 A. M. Bratkovsky , V. V. Osipov

We demonstrate a high-quality spin orbit torque nano-oscillator comprised of spin wave modes confined by the magnetic field by the strongly inhomogeneous dipole field of a nearby micromagnet. This approach enables variable spatial…

介观与纳米尺度物理 · 物理学 2021-12-28 Chi Zhang , Inhee Lee , Yong Pu , Sergei A. Manuilov , Denis V. Pelekhov , P. Chris Hammel

Synchronization of self-sustained oscillators under fixed-frequency and amplitude forcing is well understood, but how time-varying forcing mangles phase locking has been much less explored. Theory predicts that slow, deterministic…

混沌动力学 · 物理学 2026-01-07 Zhenwei Xu , Ulrich Kuhl , Nicolas Noiray

This paper proposes a novel wide-area control strategy for modulating the active power injections to damp the critical frequency oscillations in power systems, this includes the inter-area oscillations and the transient frequency swing. The…

系统与控制 · 电气工程与系统科学 2020-03-26 Ruichao Xie , Innocent Kamwa , C. Y. Chung

Recent radio frequency scanning tunneling spectroscopy (rf-STS) experiments have demonstrated nuclear and electron spin excitations up to $\pm12\hbar$ in a single molecular spin quantum dot (qudot). Despite the profound experimental…

We demonstrate and experimentally validate an end-to-end hybrid CMOS-memristor auditory encoder that realises adaptive-threshold, asynchronous delta-modulation (ADM)-based spike encoding by exploiting the inherent volatility of HfTiOx…

音频与语音处理 · 电气工程与系统科学 2025-12-08 Dongxu Guo , Deepika Yadav , Patrick Foster , Spyros Stathopoulos , Mingyi Chen , Themis Prodromakis , Shiwei Wang

This paper predicts the possibility to achieve synchronization (via injection locking to a microwave current) of spin-transfer torque oscillators based on hybrid spin-valves composed by two free layers and two perpendicular polarizers at…

材料科学 · 物理学 2015-06-15 Mario Carpentieri , Takahiro Moriyama , Bruno Azzerboni , Giovanni Finocchio

We theoretically investigate influences of electronic circuit delay, noise and temperature on write-error-rate (WER) in voltage-controlled magnetization switching operation of a magnetic-topological-insulator-based (MTI) device by means of…

介观与纳米尺度物理 · 物理学 2023-09-07 Takashi Komine , Takahiro Chiba

We report a new spin manipulation protocol for periodically reversing the sample magnetization for Magnetic Resonance Force Microscopy. The protocol modulates the microwave excitation frequency synchronously with the position of the…

介观与纳米尺度物理 · 物理学 2011-12-12 K. C. Fong , P. Banerjee , Yu. Obukhov , D. V. Pelekhov , P. C. Hammel

Spintronic devices as alternatives to traditional semiconductor-based electronic devices attract considerable interest as they offer zero quiescent power, built-in memory, scalability, and reconfigurability. To realize spintronic logic…

应用物理 · 物理学 2017-12-04 Seung-heon Chris Baek , Kyung-Woong Park , Deok-Sin Kil , Kyung-Jin Lee , Byong-Guk Park

Voltage regulation under conventional grid-forming controllers is tightly coupled to power sharing and dc-link dynamics. Consequently, its tracking accuracy deteriorates during grid faults, sudden power sharing changes, or dc-bus voltage…

系统与控制 · 电气工程与系统科学 2025-07-02 Qianxi Tang , Li Peng , Xuefeng Wang , Xinchen Yao

Spin-orbit torque arising from the spin-orbit-coupled surface states of topological insulators enables current-induced control of magnetization with high efficiency. Here, alternating-current (AC) driven magnetization reversal is…

We make measurements of power spectral density of the microwave voltage emitted by a spin torque nano-oscillator (STNO) and compare our experimental results to predictions of an analytic theory of a single-mode STNO dynamics by V. S.…

其他凝聚态物理 · 物理学 2009-11-13 C. Boone , J. A. Katine , J. R. Childress , J. Zhu , X. Cheng , I. N. Krivorotov