2014 International Workshop on Computational Electronics (IWCE)最新文献

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Efficient calculation of the two-dimensional Wigner potential 二维维格纳势的有效计算
2014 International Workshop on Computational Electronics (IWCE) Pub Date : 2014-06-03 DOI: 10.1109/IWCE.2014.6865812
P. Ellinghaus, M. Nedjalkov, S. Selberherr
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引用次数: 3
Frequency dependence study of a bias field-free nano-scale oscillator 无偏置场纳米振荡器的频率依赖性研究
2014 International Workshop on Computational Electronics (IWCE) Pub Date : 2014-06-03 DOI: 10.1109/IWCE.2014.6865862
T. Windbacher, D. Osintsev, A. Makarov, H. Mahmoudi, V. Sverdlov, S. Selberherr
{"title":"Frequency dependence study of a bias field-free nano-scale oscillator","authors":"T. Windbacher, D. Osintsev, A. Makarov, H. Mahmoudi, V. Sverdlov, S. Selberherr","doi":"10.1109/IWCE.2014.6865862","DOIUrl":"https://doi.org/10.1109/IWCE.2014.6865862","url":null,"abstract":"Oscillators belong to the group of fundamental building blocks and are ubiquitous in modern electronics. Especially spin torque nano oscillators are very attractive as cost effective on-chip integrated microwave oscillators, due to their nano-scale size, frequency tunability, broad temperature operation range, and CMOS technology compatibility. Recently, we proposed a micromagnetic structure capable of operating as non-volatile flip flop as well as a spin torque nano oscillator. The structure consists of three anti-ferromagnetically coupled stacks (two for excitation A, B and one for readout Q) and a shared free magnetic layer. Micromagnetic simulations show a current regime, where the structure exhibits large, stable, and tunable in-plane oscillations in the GHz range without the need of an external magnetic field or an oscillating current. In this work the dependence of these oscillations on the shared free layer geometry at a fixed input current is studied. It is shown that the precessional frequency can be controlled by the dimensions of the shared free layer. Most efficient is to utilize the layer thickness to control the precessional frequency, but also changing the layer length can be exploited.","PeriodicalId":168149,"journal":{"name":"2014 International Workshop on Computational Electronics (IWCE)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128884803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Monte-Carlo Simulations of Magnetic Tunnel Junctions: From physics to application 磁隧道结的蒙特卡罗模拟:从物理到应用
2014 International Workshop on Computational Electronics (IWCE) Pub Date : 2014-06-01 DOI: 10.1109/IWCE.2014.6865815
A. Vincent, W. Zhao, Jacques-Olivier Klein, S. Galdin-Retailleau, D. Querlioz
{"title":"Monte-Carlo Simulations of Magnetic Tunnel Junctions: From physics to application","authors":"A. Vincent, W. Zhao, Jacques-Olivier Klein, S. Galdin-Retailleau, D. Querlioz","doi":"10.1109/IWCE.2014.6865815","DOIUrl":"https://doi.org/10.1109/IWCE.2014.6865815","url":null,"abstract":"Magnetic Tunnel Junctions (MTJs) - the basic structures of the Spin-Transfer Torque Magnetic RAMs (STT-MRAM) currently reaching the market - present a complex and probabilistic switching behavior. Although some analytical models describing this behavior exist, they can not describe all the switching regimes of the MTJs. They can model low (“subcritical”) and high (“supercritical”) currents, but not the intermediate currents, which are essential for applications. In this work, we present Monte-Carlo simulations of MTJs that have been used to build an analytical model linking the two different current regimes. This model allowed us to perform system-level simulations of an original neuro-inspired chip that uses MTJs as binary stochastic “synapses”.","PeriodicalId":168149,"journal":{"name":"2014 International Workshop on Computational Electronics (IWCE)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128229772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
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