Study of ferromagnetic multiple-tunnel-junction devices

铁磁多隧道结器件的研究

• 批准号: 13450132
• 负责人: YAMAMOTO Masafumi
• 金额: $ 9.86万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13450132/
• 关键词: Ferromagnetic multiple-tunnel-junction; MRAM; Tunnel magnetoresistance device; Spin resonant-tunneling phenomena; 共鳴トンネル現象

Novel devices based on the concept of utilizing spin dependent resonant tunneling phenomena were investigated. The device characteristics of a resonant tunneling magnetic random access memory (MRAM) using a ferromagnetic triple-barrier structure in which both of two quantum wells are composed of ferromagnetic metals were analyzed. Calculations showed that the resonant tunneling memory consisting of a ferromagnetic triple-barrier structure could provide an exceedingly high reading current ratio for "1" and "0" of an order of 10^4%. This property is highly promising for nonvolatile ultrahigh-density spin-memory. Furthermore, we proposed and analysed a resonant tunneling spin filter, which is one of key devices for emerging spintronics, consisting of a ferromagnetic GaMnAs-based quantum well (QW) and a non-magnetic GaAs QW. Detailed calculations showed that it could produce high spin-polarized currents with polarizations exceeding 98 %.

研究了基于利用自旋依赖的谐振隧道现象的概念的新型设备。使用铁磁三重屏障结构的谐振隧穿磁随机访问（MRAM）的设备特性，其中两个量子孔中的两个均由铁磁金属组成。计算表明，由铁磁三重屏障结构组成的谐振隧道内存可以为10^4％的“ 1”和“ 0”提供极高的读取电流比。对于非挥发性超高密度自旋记忆，该特性非常有前途。此外，我们提出并分析了一个共振隧道自旋滤波器，该滤波器是新兴的Spintronics的关键设备之一，由基于铁磁的GAMNAS量子井（QW）和非磁性GAAS QW组成。详细的计算表明，它可能会产生高自旋偏振电流，极性超过98％。

项目成果

T. Marukame, T. Uemura, M. Yamamoto: "Analysis of Triple Barrier Structure Consisting of Ferromagnetic and Non-magnetic Quantum Wells"RCIQE Int. Seminar on Collected Abstracts of "Quantum Nanoelectronics for Meme-Media-Based Information Technologies". 128

T. Marukame、T. Uemura、M. Yamamoto：“由铁磁性和非磁性量子阱组成的三重势垒结构分析”RCIQE Int。

T.Uemura, T.Marukame, M.Yamamoto: "Proposal and analysis of a ferromagnetic triple-barrier resonant-tunneling spin filter"To be published in Proceedings of the IEEE Int. Magnetic Conference. (2003)

T.Uemura、T.Marukame、M.Yamamoto：“铁磁三重势垒谐振隧道自旋滤波器的提议和分析”将发表在 IEEE Int 论文集上。

T. Uemura, M. Yamamoto: "Proposal of Four-Valued MRAM based on MTJ/RTD Structure"Proc. 33^<rd> IEEE Int. Symp. On Multiple-Valued Logic. 273-278 (2003)

T. Uemura，M. Yamamoto：“基于 MTJ/RTD 结构的四值 MRAM 的提议”Proc。

T.Uemura, T.Marukame, M.Yamamoto: "Proposal and analysis of a ferromagnetic triple-barrier resonant-tunneling spin filter"IEEE Trans.on Magnetics. Vol.39(To be published). (2003)

T.Uemura、T.Marukame、M.Yamamoto：“铁磁三重势垒谐振隧道自旋滤波器的提议和分析”IEEE Trans.on Magnetics。

T. Uemura, M. Yamamoto: "Proposal and Analysis of A Ferromagnetic Triple-Barrier Resonant-Tunneling Spin Filter"To be published in IEEE Trans. On Magnetics. Vol.39. (2003)

T. Uemura、M. Yamamoto：“铁磁三重势垒谐振隧道自旋滤波器的建议和分析”将在 IEEE Trans 上发表。