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 %.

研究了基于自旋相关共振隧穿现象的新型器件。分析了两量子阱均由铁磁金属构成的铁磁三势垒结构的共振隧道磁随机存取存储器（MRAM）的器件特性。计算表明，由铁磁三势垒结构组成的谐振隧道存储器可以提供高达10^4%数量级的“1”和“0”的读取电流比。这一特性在非易失性超高密度自旋存储器中具有很大的应用前景。此外，我们提出并分析了一种共振隧道自旋滤波器，它是新兴自旋电子学的关键器件之一，由铁磁gamas量子阱和非磁性GaAs量子阱组成。详细计算表明，它可以产生极化率超过98%的高自旋极化电流。

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。