Near-field Magneto-optical Microscope for Observation of Nano-spin Structure

用于观察纳米自旋结构的近场磁光显微镜

• 批准号: 07555099
• 负责人: SATO Katsuaki
• 金额: $ 10.5万
• 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 (A)
• 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-07555099/
• 关键词: SNOM; near-field optics; magneto-optical microscopy; bent fiber probe; polarization transmittion; photoelastic modulator; focused ion beam; micro magnetic pattern of cobalt; 近視場顕微鏡; 偏光変調法; ファイバープローブ; プラチナコバルト人工格子; 光磁気記録; 微細磁性パターン; エバネセント光

This report describes the research and development of a scanning near-field magneto-optical microscope conducted under the support of Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture (Category No.07555099).Recently the rapid development in the nano-fabrication technique has lead to the realization of magnetic materials with a sub micron structure, which requires development of observation technology for the Sub-micron to nanometer region. There have been studied various observation techniques such as the magnetic force microscopy (MFM), the electron beam holography (EBH), and the spin-polarized scanning electron microscope (SPSEM). Although MFM and EBH provide ample information on the magnetic field around the magnetic materials, they do not give information of the sample magnetization directly.SPSEM is an excellent technique to observe the spin polarization of the surface directly, it still requires much fundamental studies in order to g … More et a position as a versatile measuring technique, since it is too sesitive to the surface condition of the sample. Compared with these sorts of microscopy the scanning near-field optical microscopy (SNOM) can provide direct information of the magnetization in the material itself.First we took attention on the polarization transmission properties in the bent-fiber probe, which simultaneously work as a cantilever for AFM in the system we employed. It is found that careful selection of the fiber-probe and optimization of the compensating optics can provide a good polarization characteristics. Using the fiber probe with optimized optics we successfully observed magneto-optical-images of the recorded marks on a MO disc with the dysprosium iron garnet film under the crosspolarizer configuration.Next in order to increase sensitivity of the magneto-optical signal we introduced the polarization-modulation technique using the photoelastic modulator (PEM). We successfully obtained the chevron-shaped marks on the platinum/cobalt disk with submicron length. The resolution attained was 90nm.We prepared microstructures of cobalt with sub-mirometer size using focused ion beam (FIB) technology. We obtained magneto-optical images of the microstructure. It is confirmed that the microstructure can be used as a standard pattern for the magneto-optical SNOM. Less

该报告描述了在教育，科学，体育和文化部（第07555099999999999999999号）的支持下进行的扫描和开发的研究和发展。讲习班了各种观察技术，例如磁力显微镜（MFM），电子束全息图（EBH）和自旋极化扫描电子显微镜（SPSEM）。尽管MFM和EBH提供了有关磁性材料周围磁场的充分信息，但它们并未直接提供样品磁化的信息。SPSEM是一种直接观察表面自旋极化的绝佳技术，它仍然需要大量的基本研究才能进行G…更重要的是，因为它作为一种多功能测量技术，因为它对样品表面条件过于敏感。与这类显微镜相比，扫描近场光学显微镜（SNOM）可以提供材料本身中磁化的直接信息。首先，我们注意到弯曲纤维探针中的极化传输特性，该探针仅充当我们使用的系统中AFM的悬臂。发现仔细选择纤维探针和补偿光学的优化可以提供良好的极化特性。使用具有优化光纤的纤维探针，我们成功地观察了在MO盘上记录的磁光图像，并在交叉极性构型下使用膨胀性铁石榴石膜进行了不良的铁石榴石膜。接下来，以增加磁光信号的敏感性，以提高使用光层次调节器（PEM）（PEM）介绍极性模块的磁化信号。我们成功获得了具有亚微米长度的铂/钴磁盘上的人字形形状。该分辨率为90nm。我们使用聚焦离子束（FIB）技术制备了带子尺寸的钴微结构。我们获得了微观结构的磁光图像。可以证实，微观结构可以用作磁光snom的标准模式。较少的

项目成果

光岡靖幸、中島邦雄、村松宏、安宅龍明、戸谷聡、佐藤勝昭: "SNOAMによる偏光像の観察" 第57回応用物理学会学術講演会予稿集(7pA7)1996.9.7-10. 778- (1996)

Yasuyuki Mitsuoka、Kunio Nakajima、Hiroshi Muramatsu、Tatsuaki Ataka、Satoshi Totani、Katsuaki Sato：“SNOAM 偏振图像观察”日本应用物理学会第 57 届年会记录 (7pA7) 1996.9.7-10。 (1996)

N.Chiba,K.Nakajima,et al.: "Resolution of an optical image of a scanning near-field optical/atomic force microscope as a function of sample-probe distance during synchronized irradiation" Thin Solid Films. (in press). (1996)

N.Chiba、K.Nakajima 等人：“扫描近场光学/原子力显微镜的光学图像分辨率与同步照射期间样品-探针距离的函数关系”固体薄膜。

T.Ishibashi, T.Yoshida, J.Yamamoto, K.Sato, Y.Mitsuoka and K.Nakajima: "Magneto-optical imaging by Scanning near-field optical microscope using polarization modulation technique:" J.Magn.Soc.Jpn.22(刊行予定). (1998)

T.Ishibashi、T.Yoshida、J.Yamamoto、K.Sato、Y.Mitsuoka 和 K.Nakajima：“使用偏振调制技术通过扫描近场光学显微镜进行磁光成像：”J.Magn.Soc.Jpn。 22（待出版）（1998）。

光岡靖幸、中島邦雄、村松宏、安宅龍明、戸谷聡、佐藤勝昭: "SNOAMによる偏光像の観察" 第57回応用物理学会学術講演会予稿集(7pA7)1996.9.7-10. 778 (1996)

Yasuyuki Mitsuoka、Kunio Nakajima、Hiroshi Muramatsu、Tatsuaki Ataka、Satoshi Totani、Katsuaki Sato：“SNOAM 偏振图像的观察”日本应用物理学会第 57 届年会记录 (7pA7) 1996.9.7-10 (778) 1996))

Y.Mitsuoka, K.Nagamine, K.Homma, N.Chiba, H.Muramatsu and T.Ataka and K.Sato: "Polarization characteristics andimaging in scanning near-field optical/atomic-force microscopy" Digest 15th Int.Colloquium Magnetic Films and Surfaces (ICMFS15),Sunshine Coast,

Y.Mitsuoka、K.Nagamine、K.Homma、N.Chiba、H.Muramatsu 和 T.Ataka 和 K.Sato：“扫描近场光学/原子力显微镜中的偏振特性和成像”摘要第 15 届 Int.Colloquium Magnetic