Development of Measurement Technology for Nanoscale Magnetism

纳米级磁性测量技术的发展

• 批准号: 09236102
• 负责人: SATO Katsuyuki
• 金额: $ 77.5万
• 依托单位: Tokyo University of Agriculture and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-09236102/
• 关键词: nanoscale magnetism; nonlinear magneto-optics; thermomagnetic recording; ab-initio electronic states calculation; exchange force microscope; lateral multiwire; diluted magnetic semiconductor; two dimensional plasmon; 近接場磁気光学顕微鏡; 非線形磁気光学; スピン偏極表面

To investigate magnetism in nanoscale region, we have been developing various kinds of nanocharacterization techniques. Prof. Sato investigated Fe/Au artificial superlattice by means of magnetic second harmonic generation (MSMG) technique. He observed well defined four-foid symmetry patterns in azimuthal dependence of MSHG intensity, and explained in terms of symmetry at the surface and interfaces of the Fe/Au superlattices. Prof. Ito performed molecular dynamics studies on atomic layer deposition of Pd on Ni film with a surface roughness and an in-plane strain. He elucidated that the in-plane strain of the Ni surface determines crystallographic orientation and uniformity of strain in the deposited layer. Prof. Tsunashima carried out a magneto-static simulation to prove a possibility of formation of a small domain as small as 0.1 μm by thermomagnetic recording. He also studied XMCD spectra in Dy/Fe multilayers. Prof. Mukasa developed a spin-polarized STM with photo-irradiated GaAs probes to obatain spin-polarized image of atomically flat surface of Fe thin film on the MgO substrate. Exchange force microscope has also been investigated, Prof. Oguchi obtained magneto-optical Kerr spectra in CdCrィイD22ィエD2SeィイD24ィエD2, CuCrィイD22ィエD2SeィイD24ィエD2 and PtMnSb using ab-initio energy-band calculation. Electronic origin of Kerr spectra were discussed through comparison between the calculation and the experiment. Dr. Hono conducted micro-XRD measurements Co-Al-O granular films. In addition, lateral multiple nonowire, Fe particles, diluted magnetic semiconductors, two dimensional plasmon in ultrathin metallic films, nanoheterostructure with transition metal particles buried in MgO are also investigated.

为了在纳米尺度上研究磁性，我们开发了各种纳米表征技术。佐藤教授利用磁二次谐波产生（MSMG）技术研究了Fe/Au人工超晶格。他在MSHG强度的方位依赖性中观察到明确的四类对称模式，并从Fe/Au超晶格表面和界面的对称性方面进行了解释。Ito教授对具有表面粗糙度和面内应变的Ni薄膜上Pd的原子层沉积进行了分子动力学研究。他阐明了Ni表面的面内应变决定了沉积层中应变的结晶取向和均匀性。Tsunashima教授进行了静磁模拟，证明了通过热磁记录形成小至0.1 μm的小畴的可能性。他还研究了Dy/Fe多层膜中的XMCD光谱。Mukasa教授开发了一种自旋极化STM，利用光照射GaAs探针获得了MgO衬底上Fe薄膜原子平面的自旋极化图像。Oguchi教授还研究了交换力显微镜，使用从头算能带计算获得了CdCr的磁光Kerr光谱，其中CdCr的磁光Kerr光谱为D22的磁光Kerr光谱为D22的磁光Kerr光谱为D2Se的磁光Kerr光谱为D24的磁光Kerr光谱。通过计算与实验的比较，讨论了克尔谱的电子起源。Hono博士进行了Co-Al-O颗粒膜的微观xrd测量。此外，还研究了横向多重非线、铁颗粒、稀释磁性半导体、超薄金属薄膜中的二维等离子体、MgO中埋有过渡金属颗粒的纳米异质结构。

项目成果

H.Akai: "Theory of Hyperfine fields in iron"Hyperfine Interactions. 120. 3-11 (1999)

H.Akai：“铁中超精细场理论”超精细相互作用。

H.Miyaxawa: "First-principles investigation of the magneto-optical Kerr Effect of multilayers"J.Phys. Soc.Jpn. 68. 1412-1422 (1999)

H.Miyaxawa：“多层膜磁光克尔效应的第一原理研究”J.Phys。

Y.Morishita: "Crystal structures and magnetic properties of MnAs grown by molecular-beam epitaxy on the(111)"J.Cryst. Growth. (in press).

Y.Morishita：“通过分子束外延在 (111) 上生长的 MnAs 的晶体结构和磁性”J.Cryst。

T. Tanji, S. Manabe, K. Yamamoto and T. Hirayama: "Observation of Magnetic Fine Structures by Electron Differential Microscopy"Materials Characterization. 42, 4-5. 183-192 (1999)

T. Tanji、S. Manabe、K. Yamamoto 和 T. Hirayyama：“通过电子微分显微镜观察磁性精细结构”材料表征。

K.Sato,T.Ishibashi,T.Yoshida,J.Yamamoto,A.Iijima,Y.Mitsuoka,and K.Nakajima: "Observation of Recorded Marks of MO Disk by Scanning Near-Field Magneto-Optical Microscope" J.Magn.Soc.Jpn. 23,Suppl.S1 刊行予定. (1999)

K. Sato、T. Ishibashi、T. Yoshida、J. Yamamoto、A. Iijima、Y. Mitsuoka 和 K. Nakajima：“通过扫描近场磁光显微镜观察 MO 盘的记录标记” J. Magn .Soc.Jpn. 23，增刊 S1 待出版（1999 年）。