Development of observation methods for nano-sized magnetic domains with electron holography

电子全息纳米磁畴观测方法的发展

基本信息

  • 批准号:
    13555017
  • 负责人:
  • 金额:
    $ 8.45万
  • 依托单位:
  • 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 2003
  • 项目状态:
    已结题

项目摘要

The target of the present works is to develop a new technique of in situ observations with electron holography and apply the new techniques to studies of magnetic domains in advanced materials. The results are summarized as follws:1.A new apparatus with a small hall probe was developed, which enables us to measure the magnetic field inside the objective lens. This apparatus has revealed the relation between the magnetic field near the specimen and the electric current of the objective lens so that magnetic domains can be observed in a wide range of the applied magnetic field.2.Experimental conditions to observe electron holograms were optimized by operating the electromagnets installed in the electron microscope. Visibility of the holograms was much improved.3.A technique to separate the magnetic information in holograms from the electric information (the effect of mean inner potential) was established. The electric information can be eliminated by numerical analyses of two digitized holograms, which are obtained in magnetic and nonmagnetic states, respectively.4.The new techniques were applied to studies of magnetization distribution in a perovskite-type manganite, which exhibits the well-known colossal magnetoresistance. Distribution of magnetic flux was directly observed in a magnetically phase-separated state. The results shed light on understanding of the conduction mechanism of hole-doped manganites.
本工作的目标是发展一种新的电子全息原位观测技术,并将这种新技术应用于先进材料中磁畴的研究。1.研制了一种小型霍尔探头测量物镜透镜内部磁场的装置。该装置揭示了样品附近的磁场与物镜透镜电流之间的关系,从而可以在很宽的外加磁场范围内观察磁畴。2.通过操作电子显微镜中的电磁铁,优化了观察电子全息图的实验条件。提出了一种将全息图中的磁信息与电信息分离的方法(平均内电位效应)。通过对磁态和磁态的数字化全息图进行数值分析,消除了电信息的影响。4.将新技术应用于钙钛矿型锰氧化物的磁化强度分布研究,该材料具有庞磁电阻效应。在磁相分离状态下直接观察到磁通量的分布。研究结果为理解空穴掺杂锰氧化物的导电机理提供了理论依据。

项目成果

期刊论文数量(62)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Y.Gao, D.Shindo: "Mediated exchange interaction in Fe-Nb-B nanocrystalline soft magnetic materials"Phys.Rev.B. 67. 172409(1)-172409(4) (2003)
Y.Gao,D.Shindo:“Fe-Nb-B 纳米晶软磁材料中的介导交换相互作用”Phys.Rev.B。
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Y.Gao et al.: "Mediated exchange interaction in Fe-Nb-B nanocrystalline soft magnetic materials"Phys.Rev.B. 67. 172409-1-172409-4 (2003)
Y.Gao等:“Fe-Nb-B纳米晶软磁材料中的介导交换相互作用”Phys.Rev.B。
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D.Shindo: "Characterization of a Co-CoO obliquely evaporoted magnetic tape by analytical electron microscopy and electron holography"Microscopy and Microanalysis. vol.10. 115-121 (2004)
D.Shindo:“通过分析电子显微镜和电子全息术表征 Co-CoO 倾斜蒸发磁带”显微镜和微量分析。
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    0
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D.Shindo at al.: "Magnetic domain structure of Fe_3B/Nd_2Fe_<14>B nanocomposite magnets studied by electron holography"Proc. 15th Inter. Con. on Electron Microscopy. 735-736 (2002)
D.Shindo等人:“通过电子全息术研究Fe_3B/Nd_2Fe_14B纳米复合磁体的磁畴结构”Proc。
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    0
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Y.Aoyama et al.: "Precise Evaluation of Charged Effect on SiO_2 Particles by Simulation of Holograms"Mater. Trans., 43(2002), in press.
Y.Aoyama等:“通过全息图模拟精确评估SiO_2颗粒的带电效应”材料。
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SHINDO Daisuke其他文献

SHINDO Daisuke的其他文献

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{{ truncateString('SHINDO Daisuke', 18)}}的其他基金

Bogy weight set point reset effect by exercise: Energy metabolism control mechanism of skeletal muscle UCP3
运动对转向架重量设定点的重置效果:骨骼肌UCP3的能量代谢控制机制
  • 批准号:
    19K20125
  • 财政年份:
    2019
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for Early-Career Scientists
Development of electron holography system for photoexcitation phenomena and its application to materials science
光激发现象电子全息系统的研制及其在材料科学中的应用
  • 批准号:
    19106002
  • 财政年份:
    2007
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for Scientific Research (S)
Three-dimensional analysis of magnetization distribution by MFM and electron holography
利用 MFM 和电子全息术三维分析磁化强度分布
  • 批准号:
    16206011
  • 财政年份:
    2004
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for Scientific Research (A)
Development of precise morphological analysis methods with electron holography
电子全息精密形态分析方法的发展
  • 批准号:
    11450034
  • 财政年份:
    1999
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Three dimensional structure analysis of advanced materials by electron microscope images of successive thin sections
通过连续薄片的电子显微镜图像对先进材料进行三维结构分析
  • 批准号:
    07805061
  • 财政年份:
    1995
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of quantitative analysis system for electron microscope images observed with imaging plates
开发成像板观察的电子显微镜图像定量分析系统
  • 批准号:
    05555165
  • 财政年份:
    1993
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for Developmental Scientific Research (B)
Quantitative analysis of materials by new electron microscopy technique
通过新电子显微镜技术对材料进行定量分析
  • 批准号:
    04805066
  • 财政年份:
    1992
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)

相似海外基金

Mechanism Elucidation and Development of Control Technique of Vector Magnetic Domain Structure of of Motor Core Material under Arbitrary Stress
任意应力下电机铁芯材料矢量磁畴结构的机理阐明及控制技术发展
  • 批准号:
    17K06309
  • 财政年份:
    2017
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Magnetic field and magnetic domain structure imaging with spectroscopic probe for the development of magnetic material of electric car motors
利用光谱探针进行磁场和磁畴结构成像,用于电动汽车电机磁性材料的开发
  • 批准号:
    15H02255
  • 财政年份:
    2015
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    $ 8.45万
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Magnetic Domain Structure and Anisotropic Thermal Conductivity
磁畴结构和各向异性导热率
  • 批准号:
    15340117
  • 财政年份:
    2003
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
The influence of magnetic domain structure on the electron transport in magnetic nanostructures
磁畴结构对磁性纳米结构电子输运的影响
  • 批准号:
    241990-2001
  • 财政年份:
    2002
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Postdoctoral Fellowships
The influence of magnetic domain structure on the electron transport in magnetic nanostructures
磁畴结构对磁性纳米结构电子输运的影响
  • 批准号:
    241990-2001
  • 财政年份:
    2001
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Postdoctoral Fellowships
Study of Interface Structure & Magnetic Domain Structure in Magnetic Thin Layers
界面结构研究
  • 批准号:
    9419406
  • 财政年份:
    1995
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Standard Grant
Magnetic Domain Structure Calculations in Magnetites with Defects
带缺陷磁铁矿的磁畴结构计算
  • 批准号:
    8803371
  • 财政年份:
    1988
  • 资助金额:
    $ 8.45万
  • 项目类别:
    Continuing Grant
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