应材料科学与工程学院裴文利副教授的邀请，日本国立秋田大学大学院科学工程研究中心齐藤凖教授来我院进行学术交流，欢迎各位老师和同学参加。
报告时间：11月16日（周四）10:00-11:30
报告地点：EPM四楼报告厅
报告题目：Development of alternating magnetic force microscopy and its application to advanced magnetic materials and devices
报告简介：Magnetic force microscopy (MFM) is a widely used magnetic imaging technique, because MFM has a few ten nm spatial resolution and no need of special pretreatment. In recent years, the improvement of spatial resolution and functionalities is required for the research and development of magnetic materials and magnetic devices. My research group has developed a novel form of magnetic force microscopy called alternating magnetic force microscopy (A-MFM) for imaging of DC and AC magnetic fields with ultra-high spatial resolution of less than 5 nm. A-MFM utilizes the frequency modulation of cantilever oscillation induced by applying off-resonant alternating magnetic force to a highly sensitive homemade magnetic tip. A-MFM is the first magnetic force microscopy technique that enables near-surface magnetic imaging. A-MFM has several new functionalities including a) zero detection of magnetic field, b) polarity detection of magnetic field and surface magnetic charge (N pole / S pole), c) stroboscopic AC magnetic field imaging, and d) DC magnetic field imaging with selectable measuring axis even at rough surfaces such as the fractured surface of permanent magnets. We also have developed sensitive high-resolution A-MFM tips by optimizing the magnetic properties of deposited magnetic films for each application. In this presentation, I will talkabout the typical applications and the recent progress of A-MFM.
报告人简介：齐藤凖，日本国立秋田大学大学院科学工程研究中心教授。1988年日本雷竞技官方主页获得博士学位，先后在日本秋田国立大学担任准教授、教授。齐藤教授主要从事磁记录材料、高分辨磁力显微镜的理论研究和高分辨探针的开发，曾经获得日本磁学会颁发的杰出研究奖，是该领域的知名科学家之一。
