Differential type Scanning Hall probe microscopy with high resolution of magnetic field image

具有高分辨率磁场图像的差分型扫描霍尔探针显微镜

• 批准号: 13354004
• 负责人: MIYAJIMA Hideki
• 金额: $ 27.12万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 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
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13354004/
• 关键词: magnetic measurement; nano-magnetics; scanning probe microscopy; Hall effect; micro-Hall device; magnetic domain observation; magnetic field image; micromagnetics; マイクロマグネティックス

A scanning Hall probe microscope, which can be used in external magnetic fields below 15 kOe in the temperature range from 20 K to 300K, is developed. The surface magnetic images are measured as a function external magnetic field perpendicular to a ferromagnetic film plane, and the stray-magnetic-field images above the film are obtained by subtracting the external magnetic filed contributions.A scanning probe and stage are installed in a cryostat which is set in the gap of an electromagnet generating magnetic fields up to 15 kOe. The scanning stage is made of non-magnetic stainless and sapphire ball bearing in order to avoid magnetostriction of the scanning devices. The stage is controlled by stepping motors and piezo actuators which are placed outside the cryostat and flee from the applied magnetic field. The active scanning area is 2mm x 2mm and the spatial resolution is 0.5μgm.A Si-MOSFET micro-Hall probe (SHPM), which is more durable than conventional GaAs/AlGaAs probe, was developed. The Hall coefficient of the Si-MOSFET probe, is 0.18 Ω/G at room temperature, being adequate to use in the SHPM developed in the present study.

研制了一种扫描霍尔探头显微镜，可在20~300K温度范围内工作在15kOe以下的外磁场中。将表面磁像测量为垂直于铁磁薄膜平面的函数外磁场，减去外部磁场贡献得到薄膜上方的杂散磁场图像。扫描探头和工作台安装在设置在产生高达15kOe磁场的电磁铁间隙的低温恒温器中。扫描工作台由非磁性不锈钢和蓝宝石滚珠轴承组成，以避免扫描装置的磁致伸缩。工作台由放置在低温恒温器外部的步进电机和压电致动器控制，远离所施加的磁场。主动扫描面积为2 mm×2 mm，空间分辨率为0.5μgm。研制了一种比传统的GaAsAlGaAs微霍尔探头更耐用的微霍尔探头。Si-MOSFET探头的霍尔系数在室温下为0.18Ω/G，足以用于本研究所研制的高功率微波器件。

项目成果

M.Shimizu, E.Saitoh, H.Miyajima, H.Masuda: "Development of Scanning Hall probe Microscopy with High Spatial Resolution"Journal of Magnetic Society of Japan. 28. 168-171 (2004)

M.Shimizu、E.Saitoh、H.Miyajima、H.Masuda：“高空间分辨率扫描霍尔探针显微镜的开发”日本磁学会杂志。

清水正義, 齊藤英治, 宮島英紀, 増田宏: "磁場掃引可能な微小ホールプローブ顕微鏡の開発"日本応用磁気学会誌. 28. 168-171 (2004)

Masayoshi Shimizu、Eiji Saito、Hideki Miyajima、Hiroshi Masuda：“开发能够扫描磁场的小孔探针显微镜”日本应用磁学学会杂志 28. 168-171 (2004)。

M.Shimizu, E.Saitoh, H.Miyajima, H.Masuda: "Scanning Hall Probe microscopy with high resolution of magnetic field image"Journal of Magnetism and Magnetic Materials. (in press). (2004)

M.Shimizu、E.Saitoh、H.Miyajima、H.Masuda：“具有高分辨率磁场图像的扫描霍尔探针显微镜”《磁性与磁性材料杂志》。

清水正義, 斉藤英治, 宮島英紀, 増田宏: "磁場掃引可能な微小ホールプローブ顕微鏡の開発"日本応用磁気学会誌. 28. 168-171 (2004)

Masayoshi Shimizu、Eiji Saito、Hideki Miyajima、Hiroshi Masuda：“开发能够扫描磁场的小孔探针显微镜”日本应用磁学学会杂志 28. 168-171 (2004)。

M.Shimizu, E.Saitoh, H.Miyajima, H.Masuda: "Scanning Hall Probe microscopy with high resolution of magnetic field image"Journal of Magnetism and Magnetic Materials. in press. (2004)

M.Shimizu、E.Saitoh、H.Miyajima、H.Masuda：“具有高分辨率磁场图像的扫描霍尔探针显微镜”《磁性与磁性材料杂志》。