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Voltage-induced dynamic switching in magnetic tunnel junctions (MTJs) is a writing technique for voltage-controlled magnetoresistive random access memory (VCMRAM), which is expected to be an ultimate non-volatile memory with ultra-low power…

介观与纳米尺度物理 · 物理学 2022-11-15 Rie Matsumoto , Shinji Yuasa , Hiroshi Imamura

In recent years, true random number generators (TRNGs) based on magnetic tunnelling junction (MTJ) have become increasingly attractive. This is because MTJ-based TRNGs offer some advantages over traditional CMOS-based TRNGs, such as smaller…

量子物理 · 物理学 2023-03-28 Hong Jie Ng , Shuhan Yang , Zhaoyang Yao , Hyunsoo Yang , Charles C. -W. Lim

We propose a novel spin-orbit torque (SOT) driven and voltage-gated domain wall motion (DWM)-based MTJ device and its application in neuromorphic computing. We show that by utilizing the voltage-controlled gating effect on the DWM, the…

应用物理 · 物理学 2022-12-20 Aijaz H Lone , Hanrui Li , Nazek El-Atab , Xiaohang Li , Hossein Fariborzi

We investigated the performance of spin transfer torque random access memory (STT-RAM) cell with cross shaped Heusler compound based free layer using micromagnetic simulations. We designed the free layer using Cobalt based Heusler…

新兴技术 · 计算机科学 2014-01-28 Tangudu Bharat Kumar , Bhaskar Awadhiya , E. MeherAbhinav , Bahniman Ghosh , Bhupesh Bishnoi

The temperature dependence of a vortex-based nano-oscillator induced by spin transfer torque (STVO) in magnetic tunnel junctions (MTJ) is considered. We obtain emitted signals with large output power and good signal coherence. Due to the…

材料科学 · 物理学 2015-06-03 P. Bortolotti , A. Dussaux , J. Grollier , V. Cros , A. Fukushima , H. Kubota , K. Yakushiji , S. Yuasa , K. Ando , A. Fert

Magnetic tunnel junctions (MTJs) are key components of spintronic devices, such as magnetic random-access memories. Normally, MTJs consist of two ferromagnetic (FM) electrodes separated by an insulating barrier layer. Their key functional…

材料科学 · 物理学 2024-09-06 Kartik Samanta , Yuan-Yuan Jiang , Tula R. Paudel , Ding-Fu Shao , Evgeny Y. Tsymbal

The phenomenon of spin transfer torque (STT) has attracted a great deal of interests due to its promising prospects in practical spintronic devices. In this paper, we report a theoretical investigation of STT in a noncollinear magnetic…

介观与纳米尺度物理 · 物理学 2017-05-17 Xiaobin Chen , Chenyi Zhou , Zhaohui Zhang , Jingzhe Chen , Xiaohong Zheng , Lei Zhang , Can-Ming Hu , Hong Guo

We investigate switching of magnetic tunnel junctions (MTJs) driven by the thermal effect of the transport current through the junctions. The switching occurs in a specially designed composite free layer, which acts as one of the MTJ…

介观与纳米尺度物理 · 物理学 2018-01-17 A. F. Kravets , D. M. Polishchuk , V. A. Pashchenko , A. I. Tovstolytkin , V. Korenivski

We report the possibility of achieving an order of magnitude reduction in the energy dissipation needed to write bits in perpendicular magnetic tunnel junctions (p-MTJs) by simulating the magnetization dynamics under a combination of…

介观与纳米尺度物理 · 物理学 2019-10-02 Austin Roe , Dhritiman Bhattacharya , Jayasimha Atulasimha

Antiferromagnetic Tunnel Junctions (AFMTJs) offer picosecond switching and high integration density for in-memory computing, but their ultrafast dynamics and low tunnel magnetoresistance (TMR) make state-of-the-art MRAM interfaces…

硬件体系结构 · 计算机科学 2026-02-13 Yousuf Choudhary , Tosiron Adegbija

Arrays of Vortex Transitional (VT) memory cells with functional density up to $1 Mbit/cm^2$ have been designed, fabricated, and successfully demonstrated. This progress is due to recent advances in design optimization and in superconductor…

应用物理 · 物理学 2019-05-22 Vasili K. Semenov , Yuri A. Polyakov , Sergey K. Tolpygo

Magnetic tunnel junctions (MTJs) are basic building blocks for devices such as magnetic random access memories (MRAMs). The relevance for modern computation of non-volatile high-frequency memories makes ac-transport measurements of MTJs…

介观与纳米尺度物理 · 物理学 2017-02-08 Subir Parui , Mário Ribeiro , Ainhoa Atxabal , Amilcar Bedoya-Pinto , Xiangnan Sun , Roger Llopis , Fèlix Casanova , Luis E. Hueso

Strain-mediated voltage control of magnetization in piezoelectric/ferromagnetic systems is a promising mechanism to implement energy-efficient spintronic memory devices. Here, we demonstrate giant voltage manipulation of MgO magnetic tunnel…

介观与纳米尺度物理 · 物理学 2016-09-02 Zhengyang Zhao , Mahdi Jamali , Noel D'Souza , Delin Zhang , Supriyo Bandyopadhyay , Jayasimha Atulasimha , Jian-Ping Wang

The tunnel magnetoresistance (TMR) in the magnetic tunnel junction (MTJ) with embedded nanoparticles (NPs) was calculated in range of the quantum-ballistic model. The simulation was performed for electron tunneling through the insulating…

介观与纳米尺度物理 · 物理学 2016-03-25 Arthur Useinov , Lin-Xiu Ye , Niazbeck Useinov , Te-Ho Wu , Chih-Huang Lai

We report on a voltage tunable radio-frequency (RF) detector based on a magnetic tunnel junction (MTJ). The spin-torque diode effect is used to excite and/or detect RF oscillations in the magnetic free layer of the MTJ. In order to reduce…

介观与纳米尺度物理 · 物理学 2015-06-22 Witold Skowroński , Marek Frankowski , Jerzy Wrona , Tomasz Stobiecki , Piotr Ogrodnik , Józef Barnaś

Low barrier nanomagnets have attracted a lot of research interest for their use as sources of high quality true random number generation. More recently, low barrier nanomagnets with tunable output have been shown to be a natural hardware…

应用物理 · 物理学 2020-03-09 Punyashloka Debashis , Rafatul Faria , Kerem Y. Camsari , Supriyo Datta , Zhihong Chen

We report on first-principles calculations of spin-transfer torque (STT) in epitaxial magnetic tunnel junctions (MTJs) based on ferrimagnetic tetragonal Mn$_3$Ga electrodes, both as analyzer in an Fe/MgO stack, and also in an analogous…

介观与纳米尺度物理 · 物理学 2022-01-10 Maria Stamenova , Plamen Stamenov , Farzad Mahfouzi , Quilong Sun , Nicholas Kioussis , Stefano Sanvito

Magnetic tunnel junction (MTJ)-based magnetic random-access memory (MRAM) is a promising platform for neuromorphic and in-memory computing owing to its non-volatility, high endurance, fast switching dynamics and CMOS compatibility. However,…

Nanoscale magnetic tunnel junction (MTJ) devices can efficiently convert thermal energy in the environment into random bitstreams for computational modeling and cryptography. We recently showed that perpendicular MTJs activated by…

介观与纳米尺度物理 · 物理学 2023-11-09 Laura Rehm , Md Golam Morshed , Shashank Misra , Ankit Shukla , Shaloo Rakheja , Mustafa Pinarbasi , Avik W. Ghosh , Andrew D. Kent

Antiferromagnetic Tunnel Junctions (AFMTJs) enable picosecond switching and femtojoule writes through ultrafast sublattice dynamics. We present the first end-to-end AFMTJ simulation framework integrating multi-sublattice…

硬件体系结构 · 计算机科学 2026-02-10 Yousuf Choudhary , Tosiron Adegbija