An Introduction to Spin Wave Computing
Abdulqader Mahmoud,Florin Ciubotaru,Frederic Vanderveken,Andrii V. Chumak,Said Hamdioui,Christoph Adelmann,Sorin Cotofana +6 more
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TLDR
It is argued that spin-wave circuits need to be embedded in conventional CMOS circuits to obtain complete functional hybrid computing systems and the benchmark indicates that hybridspin-wave--CMOS systems promise ultralow-power operation and may ultimately outperform conventionalCMOS circuits in terms of the power-delay-area product.Abstract:
This paper provides a tutorial overview over recent vigorous efforts to develop computing systems based on spin waves instead of charges and voltages Spin-wave computing can be considered as a subfield of spintronics, which uses magnetic excitations for computation and memory applications The tutorial combines backgrounds in spin-wave and device physics as well as circuit engineering to create synergies between the physics and electrical engineering communities to advance the field towards practical spin-wave circuits After an introduction to magnetic interactions and spin-wave physics, all relevant basic aspects of spin-wave computing and individual spin-wave devices are reviewed The focus is on spin-wave majority gates as they are the most prominently pursued device concept Subsequently, we discuss the current status and the challenges to combine spin-wave gates and obtain circuits and ultimately computing systems, considering essential aspects such as gate interconnection, logic level restoration, input-output consistency, and fan-out achievement We argue that spin-wave circuits need to be embedded in conventional CMOS circuits to obtain complete functional hybrid computing systems The state of the art of benchmarking such hybrid spin-wave--CMOS systems is reviewed and the current challenges to realize such systems are discussed The benchmark indicates that hybrid spin-wave--CMOS systems promise ultralow-power operation and may ultimately outperform conventional CMOS circuits in terms of the power-delay-area product Current challenges to achieve this goal include low-power signal restoration in spin-wave circuits as well as efficient spin-wave transducersread more
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References
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Spintronics based random access memory: a review
Sabpreet Bhatti,Rachid Sbiaa,Atsufumi Hirohata,Hideo Ohno,Shunsuke Fukami,S. N. Piramanayagam +5 more
TL;DR: This article reviews spintronics based memories, in particular, magnetic random access memory (MRAM) in a systematic manner and discusses some of the future technologies that might help the industry to move beyond the conventional MRAM technology.
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Hybridizing ferromagnetic magnons and microwave photons in the quantum limit
Yutaka Tabuchi,Seiichiro Ishino,Toyofumi Ishikawa,Rekishu Yamazaki,Koji Usami,Yasunobu Nakamura +5 more
TL;DR: Large normal-mode splitting between a magnetostatic mode (the Kittel mode) in a ferromagnetic sphere of yttrium iron garnet and a microwave cavity mode is demonstrated.
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Magnon transistor for all-magnon data processing
TL;DR: It is demonstrated that the density of magnons flowing from the transistor’s source to its drain can be decreased three orders of magnitude by the injection of Magnon–magnon interactions into the transistor's gate.
Journal ArticleDOI
Magnetic skyrmion logic gates: conversion, duplication and merging of skyrmions
TL;DR: In this article, the conversion, duplication and merging of isolated skyrmions with different chirality and topology are demonstrated all in one system, and they also demonstrate the conversion of another form of a Skyrmion into another form, i.e., a bimeron.
Journal ArticleDOI
The theory of ferromagnetic resonance at high signal powers
TL;DR: In this paper, it was shown that these effects are connected with two kinds of instability of the uniform precessional motion of the total magnetization against certain spin-wave disturbances; these disturbances will grow, exponentially to begin with, when the signal level exceeds certain threshold values.