洛伦兹电镜在本科教学中的应用  

Application of Lorentz Electron Microscope in Undergraduate Teaching

作　　者：张军伟[1,2] 蒙萱[1,2] 邓霞[1,2] 关超帅 朱柳 李华[1,2] 王涛[1,3] 彭勇[1,2] ZHANG Junwei;MENG Xuan;DENG Xia;GUAN Chaoshuai;ZHU Liu;LI Hua;WANG Tao;PENG Yong(School of Materials and Energy,Lanzhou University,Lanzhou 730000,China;Electron Microscopy Centre,Lanzhou University,Lanzhou 730000,China;School of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学材料与能源学院,甘肃兰州730000 [2]兰州大学电镜中心,甘肃兰州730000 [3]兰州大学物理科学与技术学院,甘肃兰州730000

出　　处：《大学物理实验》2024年第4期51-57,共7页Physical Experiment of College

基　　金：国家自然科学基金(51801087);甘肃省自然科学基金(21JR7RA494);兰州大学首批“以研带学”类课程项目(1412067)。

摘　　要：磁畴是磁性材料中的基础结构,它决定了材料的磁学性质。通过深入研究磁畴,我们可以深入理解磁性材料的特性,优化其性能,进而推动相关应用的进步。洛伦兹电镜,作为一种基于透射电镜的设备,能够观察和分析磁性材料的磁畴结构。其工作原理是利用洛伦兹力使电子束发生偏转,形成明暗相间的图案,从而反映出面内磁矩的不同取向。洛伦兹电镜具有超高的探测灵敏度,其分辨率能够达到纳米量级,因此被广泛应用于磁性材料的研究。将洛伦兹电镜引入本科教学是非常有意义的。通过实际操作,学生可以更好地掌握科学研究的实践技能和方法。同时,学生还能够培养科研素养和科研能力,为他们未来的科研工作打下坚实的基础。因此,将洛伦兹电镜应用于本科教学不仅是可行的,而且是必要的。The magnetic domain is the fundamental structure in magnetic materials,which dictates their magnetic properties.By conducting in-depth investigations into magnetic domains,we can enhance our understanding of the characteristics of magnetic materials,optimize their performance,and further advance related applications.The Lorentz transmission Electron Microscope(LTEM),as a device based on transmission electron microscopy,enables the observation and analysis of the magnetic domain structures of these materials.Its operational principle relies on utilizing the Lorentz force to deflect the electron beam,resulting in patterns with alternating brightness that reflect different orientations of magnetic moments within the plane.With its ultrahigh detection sensitivity and nanometer-level resolution,LTEM finds extensive application in studying magnetic materials.Introducing LTEM into undergraduate teaching holds significant importance as it allows students to gain practical skills and research methods through hands-on experience.Simultaneously,it cultivates scientific research literacy and capabilities among students while laying a solid foundation for their future scientific endeavors.Therefore,applying LTEM in undergraduate teaching is not only feasible but also necessary.

关 键 词：洛伦兹电子显微镜 磁畴 本科教学 斯格明子 

分 类 号：O482.5[理学—固体物理]