8050午夜二级

湖州师范学院党委宣传部、消息中间主办
来源:理学院 发布日期:2020-05-14
申报标题:  DM相互感化下磁纳米线中的畴壁活动
报 告 人: 孙周洲传授 (苏州大年夜学物文迷信与技巧学院) 
时    间:5月18日(星期一),8:30 
地    点:1-401物理学科会议室 
申报摘要: 
        Field-driven domain wall (DW) motion in magnetic nanowires with easy- and hard-axis anisotropies has attracted much interest in nanomagnetism studies. In this talk, I will introduce our research works on the DW motion in the presence of the bulk Dzyaloshinskii-Moriya interaction (DMI), which was analytically and numerically studied based on the Landau-Lifshitz-Gilbert equation. We proposed a new trial function and found an exact solution for DW motion along a uniaxial nanowire driven by an external field. A new strategy was suggested to speed up DW motion in a uniaxial nanowire with large DMI parameters. In the presence of hard-axis anisotropy, we found that the breakdown field and velocity of DW motion was strongly affected by the strength and sign of the DMI parameter under external fields. The work may be useful for future magnetic information storage devices based on DW motion.

申报人简介: 
        孙周洲,1999年本科卒业于浙江大年夜学物理系,2006年在喷鼻港科技大年夜学物理系取得实际物理博士学位。2006-2008年在喷鼻港城市大年夜学物理与材料迷信系任研究员,2009-2011年获德国洪堡基金会赞助在德国雷根斯堡大年夜学实际物理所任研究员。2011年8月至今任苏州大年夜学物文迷信与技巧学院特聘传授,博士生导师。发表多篇具有高影响因子的论文,包含Phys.Rev.Lett., Phys.Rev.B, Appl.Phys.Lett.等。今朝重要研究兴趣有自旋电子学,纳米磁动力学,磁光实际及量子输运实际等。