Abstract:
In this talk, I will take tetragonal and rhombohedral mixed-phase BiFeO¬3 as an example to share with you about our investigating steps and thinking process when dealing with a new research problem. Ferroelectricity, magnetism and the electrical control of magnetization are of particular interest in emergent state of the material. In order to look deep into those properties, a combination of scanning probe microscopy (SPM) and x-ray absorption based techniques (including x-ray absorption spectroscopy (XAS), x-ray circular/linear dichroism (XCD/XLD) analysis, photo-emission electron microscopy (PEEM), etc.) has been employed. This talk will focus on the study process of how we first understand the ferroelectric and magnetic properties separately and then combining all the knowledge and tools to finally realise a deterministic electric control of magnetism in this system.

何清，英国杜伦大学(Durham University)。2011年毕业于美国加州大学伯克利分校物理系，获得物理博士学位。同年获得美国劳伦斯国家实验室(Lawrence Berkeley National Laboratory)ALS博士后基金(Advanced Light Source Postdoctoral Fellowship)的资助，开展博士后研究。2014年2月受聘于英国杜伦大学，任职讲师，从事凝聚态实验物理和材料科学的交叉领域研究,主要探索功能氧化物薄膜、界面、畴壁、表面以及纳米结构等量子受限系统的新颖特性和物理机制。迄今为止已在国外重要学术期刊发表SCI论文超过40余篇，其中包括Science 1篇，Nature子刊8篇，以及Physical Review Letters 10篇，论文引用超过2300次，H因子20。她博士期间曾获得Jackson C. Koo奖和美国物理学会Ovshinsky学生奖，多次担任本领域国际顶级学术会议分会主席，并做过数十次国际学术邀请或口头报告。