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The storage industry is moving toward emerging non-volatile memories (NVMs), including the spin-transfer torque magnetoresistive random-access memory (STT-MRAM) and the phase-change memory (PCM), owing to their high density and low-power…

Emerging Technologies · Computer Science 2020-04-28 Nikhil Rangarajan , Satwik Patnaik , Johann Knechtel , Ozgur Sinanoglu , Shaloo Rakheja

A ringing free bit addressing scheme for magnetic memories like MRAM (magnetic random access memory) is proposed. As in standard MRAM addressing schemes the switching of a selected cell is obtained by the combination of two half-select…

Materials Science · Physics 2010-08-19 H. W. Schumacher

We study the protocol known as quantum state transfer for a strongly coupled antiferromagnetic spin chain or ring (acting as a spin bus), with weakly coupled external qubits. By treating the weak coupling as a perturbation, we find that…

Quantum Physics · Physics 2013-04-25 Sangchul Oh , Lian-Ao Wu , Yun-Pil Shim , Mark Friesen , Xuedong Hu

The magnetic Gilbert damping and spin-orbital to charge interconversion phenomenon play vital role in controlling the modern spintronics device performances. Though the ferromagnets (FMs) and heavy metals (HMs) are considered to be the key…

Mesoscale and Nanoscale Physics · Physics 2024-11-05 Antarjami Sahoo , Swayang Priya Mahanta , Subhankar Bedanta

Heusler compounds have been intensively studied owing to the important technological advancements that they provide in the field of shape memory, thermomagnetic energy conversion and spintronics. Many of their intriguing properties are…

Stochastic magnetic tunnel junctions (sMTJ) using low-barrier nanomagnets have shown promise as fast, energy-efficient, and scalable building blocks for probabilistic computing. Despite recent experimental and theoretical progress, sMTJs…

Mesoscale and Nanoscale Physics · Physics 2024-05-03 Kemal Selcuk , Shun Kanai , Rikuto Ota , Hideo Ohno , Shunsuke Fukami , Kerem Y. Camsari

Storage Class Memory (SCM) is a class of memory technology which has recently become viable for use. Their namearises from the fact that they exhibit non-volatility of data, similar to secondary storage while also having latencies…

Hardware Architecture · Computer Science 2019-09-27 Aditya K Kamath , Leslie Monis , A Tarun Karthik , Basavaraj Talawar

We investigate the dependence of the switching current density on the exchange stiffness constant in the spin transfer torque magnetic tunneling junction structure with micromagnetic simulations. Since the widely accepted analytic…

Materials Science · Physics 2015-06-05 Chun-Yeol You

Evaluating lesion progression and treatment response via longitudinal lesion tracking plays a critical role in clinical practice. Automated approaches for this task are motivated by prohibitive labor costs and time consumption when lesion…

Computer Vision and Pattern Recognition · Computer Science 2022-12-13 Wen Tang , Han Kang , Haoyue Zhang , Pengxin Yu , Corey W. Arnold , Rongguo Zhang

Spin Hall effect (SHE) and voltage-controlled magnetic anisotropy (VCMA) are two promising methods for low-power electrical manipulation of magnetization. Recently, magnetic field-free switching of perpendicular magnetization through SHE…

Last level caches (LLCs) occupy a large chip-area and there size is expected to grow further to offset the limitations of memory bandwidth and speed. Due to high leakage consumption of SRAM device, caches designed with SRAM consume large…

Hardware Architecture · Computer Science 2014-08-12 Sparsh Mittal

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…

Mesoscale and Nanoscale Physics · Physics 2017-05-17 Xiaobin Chen , Chenyi Zhou , Zhaohui Zhang , Jingzhe Chen , Xiaohong Zheng , Lei Zhang , Can-Ming Hu , Hong Guo

A heat-assisted multiferroic solid-state memory design is proposed and analysed, based on a PbNbZrSnTiO3 antiferroelectric substrate and Ni81Fe19 magnetic free layer. Information is stored as magnetisation direction in the free layer of a…

Mesoscale and Nanoscale Physics · Physics 2017-10-11 Serban Lepadatu , Melvin M. Vopson

Spin-orbit torque (SOT)-based perpendicularly magnetized memory devices with multistate memory have garnered significant interest due to their applicability in low-power in-memory analog computing. However, current methods are hindered by…

Mesoscale and Nanoscale Physics · Physics 2024-10-08 Raghvendra Posti , Chirag Kalouni , Dhananjay K Tiwari , Debangsu Roy

Naturally random devices that exploit ambient thermal noise have recently attracted attention as hardware primitives for accelerating probabilistic computing applications. One such approach is to use a low barrier nanomagnet as the free…

Mesoscale and Nanoscale Physics · Physics 2021-05-05 Kerem Y. Camsari , Mustafa Mert Torunbalci , William A. Borders , Hideo Ohno , Shunsuke Fukami

Reducing energy dissipation while increasing speed in computation and memory is a long-standing challenge for spintronics research. In the last 20 years, femtosecond lasers have emerged as a tool to control the magnetization in specific…

The discovery of spin torque transfer (STT) has lead to a significant advance in the development of spintronic devices. Novel structures and materials have been studied in order to improve the performance of the magnetic tunnel junctions…

Mesoscale and Nanoscale Physics · Physics 2009-08-24 Xiaofeng Yao , Yisong Zhang , Andrew Lyle , Roger Malmhall , Rajiv Ranjan , Lei Lu , Mingzhong Wu , Hao Wang , Ying Jing , Jian-Ping Wang

The spin Hall effect (SHE) generates spin currents within nonmagnetic materials. Previously, studies of the SHE have been motivated primarily to understand its fundamental origin and magnitude. Here we demonstrate, using measurement and…

Materials Science · Physics 2013-05-30 Luqiao Liu , O. J. Lee , T. J. Gudmundsen , D. C. Ralph , R. A. Buhrman

We studied the magnetization reversal rates of thermally assisted spin transfer torque switching in a ferromagnetically coupled synthetic free layer theoretically. By solving the Fokker-Planck equation, we obtained the analytical expression…

Mesoscale and Nanoscale Physics · Physics 2011-02-28 Tomohiro Taniguchi , Hiroshi Imamura

As a unique mechanism for MRAMs, magnetic coupling needs to be accounted for when designing memory arrays. This paper models both intra- and inter-cell magnetic coupling analytically for STT-MRAMs and investigates their impact on the write…

Emerging Technologies · Computer Science 2020-11-24 Lizhou Wu , Siddharth Rao , Mottaqiallah Taouil , Erik Jan Marinissen , Gouri Sankar Kar , Said Hamdioui
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