Control of spin polarization by voltage for the magneto-optical devises

通过电压控制磁光器件的自旋极化

• 批准号: 16360144
• 负责人: DOI Masaaki
• 金额: $ 9.66万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16360144/
• 关键词: spin polarization; Mossbauer effect; voltage control; ultra thin oxide layer; epitaxial; spin injection

For the fabrication of the voltage controlled spin polarization multilayer, the experiment has been carried out by following step.1.The apparatus for the fabrication and analysis of the thin film was set up.1)The apparatus for the fabrication of oxide thin film and in-situ measurement system was set up.2)The measurement system for the Mossbauer effect was set up.2.The establishment of the fabrication and analysis method for the Nano-Oxide-Layer.1)Study for the structural and magnetic properties of CoFe-NOL(Nano-Oxide-Layer).2)Study on the fabrication of Ta_2O_5 with high dielectric constant.3.Study for the structural and magnetic properties of MNOM (metal/native oxide multilayer).1)Fabrication and structural analyses of MNOM2)The design of the voltage controlled spin polarization multilayerThe estimation method of the nano-oxide layer by using the conductive atom force microscope was established. From the analysis of magnetization process under magnetic cooling effect and Mossbauer spectrum, the magnetic structure of ultra thin oxide of CoFe and Fe were clarified. We also succeeded in the fabrication of ultra thin Ta_2O_5 with high dielectric constant. The design of the voltage controlled spin polarization multilayer by the metal/native oxide multilayer was discussed by using ultra thin Ta_2O_5. The experiment for the spin polarization controlled by voltage should be continued.

对于电压控制自旋极化多层膜的制备，实验按照以下步骤进行：1.搭建薄膜制备和分析装置。1）氧化物薄膜制备和分析装置。搭建了原位测量系统。2）搭建了穆斯堡尔效应测量系统。2.纳米氧化物层的制备与分析方法的建立。1）纳米氧化物层的结构和磁性能研究CoFe-NOL(Nano-Oxide-Layer)。2)高介电常数Ta_2O_5的制备研究。3.MNOM(金属/原生氧化物多层)的结构和磁性能研究。1)制备和结构分析MNOM2)压控自旋极化多层膜的设计建立了利用导电原子力显微镜对纳米氧化层进行评估的方法。通过磁冷却效应下的磁化过程和穆斯堡尔谱的分析，阐明了CoFe和Fe超薄氧化物的磁结构。我们还成功制备了超薄高介电常数Ta_2O_5。讨论了利用超薄Ta_2O_5由金属​​/自然氧化物多层膜设计的压控自旋极化多层膜。电压控制自旋极化的实验应该继续进行。

项目成果

Self aligned periodic Ni nano dots embedded in nano-oxidelayer

嵌入纳米氧化物层中的自对准周期性镍纳米点

• 发表时间: 2007
• 作者: M.Doi

Experimental and Simulation Study to Identify Current-Confined Path in Cu-Al Space Layer for CPP-GMR Spin-Valve Applications

用于识别 CPP-GMR 自旋阀应用的 Cu-Al 空间层中的电流限制路径的实验和仿真研究

• 发表时间: 2006
• 作者: J.Y.Sho

STRUCTURAL CHARACTERIZATION OF Co_Fe_x NANO OXIDE LAYER

Co_<100-X>Fe_x纳米氧化物层的结构表征

• 发表时间: 2006
• 作者: Hiroaki Endo

Enhancement of Room Temperature-Exchange Biasing in Specular Spin Valves

镜面自旋阀中室温交换偏置的增强

• 发表时间: 2005
• 作者: M.Doi

Self aligned periodic Ni nano dots embedded in nano-oxide-layer

嵌入纳米氧化物层中的自对准周期性镍纳米点

• 发表时间: 2007
• 作者: M.Doi