The structure control of metal fine particle with micelle structure and the development of ferromagnet

胶束结构金属微粒的结构控制及铁磁体的发展

基本信息

批准号：
11490003
负责人：
INO Shozo
金额：
$ 9.09万
依托单位：
Utsunomiya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11490003/
关键词：
metal fine particle organic molecule micelle structure metal thin film thin film fine structure ferromagnetic film X-ray spectroscopy 金属微粒子強磁性薄膜

项目摘要

We have constructed an ultra-high vacuum apparatus in which we can acheave "in situ observation" of the structures, compositions, bonding states and magnetization processes in the growing process of MTP (Multiply Twnnned Particle) ultrafine particle. Besides, we have developed a new double crystal X-ray spectrometer combined with RHEED (Reflection High Energy Electron Diffraction). Using the apparatus, we measured the charactristic X-ray FeK α which were emitted from Fe thin film on Si (111) and a high resolution of 〜6.0 eV was achieved.Using these apparatus, we studied the structures and the corresponding magnetization processes in the growth processes of Fe, Nd and Fe-Nd alloy. According to the RHEED analysis, we discovered that the structure of grown Nd film is not the bulk ABAC type hcp structure but fcc.We made "MTP nano micelle" by dissolving the evaporated Au/NaCl multi layer film in the thiol (β-mercaptopropionic acid) solution. We found that the optimum concentration of thiol … More was 〜1.0×10^<-3> mol/l. We observed hexagonal net works of the MTP micelle in the electron micrographs taken from the micelles made with optimum concentration of thiol. The observed gap beween the particles were 〜12Å which corresponds to the twice of the length of the thiole molecules.We have developed a new method to make the granuler magnetic material by mixing the different metal vapors after the condensation of fine particles in the sputtering process in the rare gas. Applying the method, we made Fe granuler magnetic material of Fe/Ag system and studied the magnetic natures and found that the magnetic force works between the particles and the magnetic property can be controlled.The fcc structure is formed when Fe thin film is grown on the Rh (001) surfece. We studied the structures in details in the growth process by LEED.The result was that the Fe film take fcc structure up to 3 monolayers and the lattice spacing of the 4th layer decreased quickly to transform to the bcc original structure. Less

我们已经构建了一个超高的真空设备，可以在其中“原位观察”对MTP（多重twnned粒子）超细粒子的生长过程中的结构，组成，键合状态和磁化过程。此外，我们已经开发了一种新的双晶X射线光谱仪，并结合了Rheed（反射高能电子衍射）。使用该设备，我们测量了从Si（111）上的Fe薄膜发射的特征X射线FEKα，并实现了〜6.0 eV的高分辨率。使用这些设备，我们研究了Fe，ND和Fe-ND合金的生长过程中的结构和相应的磁化过程。根据Rheed的分析，我们发现成长的膜的结构不是散装的ABAC型HCP结构，而是FCC。我们通过溶解在硫醇（β-含量丙酸）溶液中的蒸发AU/NACL多层膜来制作“ MTP纳米胶束”。我们发现硫醇的最佳浓度…更多是〜1.0×10^<-3> mol/l。我们观察到MTP胶束在电子显微照片中的六角净作品，从最佳硫醇浓度制成的胶束中。观察到的颗粒之间的间隙约为12Å，对应于硫核分子的长度的两倍。我们开发了一种新方法，通过在稀有气体中溅射过程中的细颗粒凝结后，通过将不同的金属蒸气混合在一起，通过混合不同的金属蒸气来制造颗粒状磁性材料。应用该方法，我们制造了Fe/Ag系统的Fe Granuler磁性材料，并研究了磁性天性，发现可以控制颗粒和磁性之间的磁力作用。当Fe薄膜在RH（001）表面上生长时，形成了FCC结构。我们通过LEED研究了生长过程中细节的结构。结果是，FE膜将FCC结构最多可达3个单层，而第四层的晶格间距很快变质，以转化为BCC原始结构。较少的