Studies of mesoscopic structures with synchrotron X-rays

利用同步加速器 X 射线研究细观结构

• 批准号: 07044135
• 负责人: HASHIZUME Hiroo
• 金额: $ 2.82万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07044135/
• 关键词: mesoscopic materials; mechanofusion; synchrotron X-ray powder diffration,; metal glass; magnetic thin films; X-ray magnetic scattering; メソスコピック構造; シンクロトロン放射; 高分解X線回折; メソスコピック; 微粉末; 炭化物; 窒化物; 非晶; 構造乱れ; シンクロトリン放射; X線回折

Mesoscopic structures in mechanofusion powders, metal glasses and magnetic multilayrs have been investigated using high-resolution synchrotron X-ray scattering techniques. It was revealed that the mesoscopic structures in ball-milled Fen powder undergo a wide variety of changes depending on heattreatment conditions. Ball-milled TiAl involves highly disordered alloy phases which change into the TiAl_3 crystalline phase on annealing. X-ray powder data were collected from FeSiBCoCuNb nanocrystalline alloy, which shows an improved magnetic permeability over conventional finemet (FeSiBCuNb). The structure/property correlation was investigated by using samples annealed in various conditions. As to the magnetic materials, the magnetization structures of Fe/Gd multilayrs were explored using the resonant X-ray magnetic scattering technique. It was made clear that 5 nmthick Gd layrs are nonuniformly magnetized in both the aligned and twisted states. In the aligned state, the Gd layrs are more strongly magnetized near the Fe interfaces than at the film centers. The twist angle of the Gd magnetic moment in the twisted state is also nonuniform over the film thickness and it is perpendicular to the applied magnetic field at a temperature 30ﾟC below the compensation temperature.

已经使用高分辨率同步加速器X射线散射技术研究了机械输液粉，金属玻璃和磁性多层中的介观结构。据揭示，球形芬粉中的介观结构会根据供热条件而发生多种变化。球麦片TIAL涉及高度无序的合金相，这些阶段会变成退火时的Tial_3晶相。 X射线粉末数据是从Fesibcocunb纳米晶合金中收集的，该合金显示出比常规曲线（Fesibcunb）的磁渗透性提高。使用在各种条件下退火的样品研究结构/性质相关性。至于磁性材料，使用谐振X射线磁散射技术探索了Fe/Gd Multilayrs的磁化结构。清楚地表明，在对齐状态和扭曲状态下，5 nmthick gd layr均未均匀地磁化。在对齐状态下，GD Layrs在Fe界面附近比在胶片中心更为强烈。在扭曲状态下，GD磁矩的扭曲角在膜厚度上也不均匀，并且垂直于在补偿温度以下30°C的温度下施加的磁场。

项目成果

A.Yu,Nikulin 他: "Modwl-independent determination of the strain distribution for a Si0.9Ge0.l/Si superlattice using X-ray diffractometry data" Physical Review B. 53. 8277-8282 (1996)

A. Yu、Nikulin 等人：“使用 X 射线衍射数据独立于 Modwl 确定 Si0.9Ge0.l/Si 超晶格的应变分布”物理评论 B. 53. 8277-8282 (1996)

A.Calka: "Applocation of synchrotron rediation for structure analysis of mesoscopic structures produced by ball milling" Mater. Sci. Forum. 235-238. 517-522 (1997)

A.Calka：“应用同步加速器辐射对球磨产生的介观结构进行结构分析”Mater。

A.CALKA: "Application of Synchrotron radiation for structure analysis of wesoscopic structures produced by ball willing" Mater.Sci.Forum. 235-238. 517-522 (1997)

A.CALKA：“应用同步辐射对球意愿产生的微观结构进行结构分析”Mater.Sci.Forum。

A.CALKA: "Application of synchrotion radiation for structure analysis of mesoscopic structures produced by ball milling" Matu,Sci,Horum. 235-238. 517-522 (1997)

A.CALKA：“应用同步辐射对球磨产生的介观结构进行结构分析”Matu、Sci、Horum。

O.Sakata 他: "Application of grazing-angle X-ray standing waves to the in-plane structure of a 100Å thicle epitaxial film" Acta Crystallographica. (1997)

O. Sakata 等人：“掠射角 X 射线驻波在 100Å 粗晶外延膜面内结构中的应用”《晶体学报》(1997)。