从高温超导交流抗磁性实验中学习超导电性的教学探索  

AC diamagnetism experiment of a high temperature superconductor

作　　者：何振辉 刘艳芬 赵芳 HE Zhen-hui;LIU Yan-fen;ZHAO Fang(School of Physics and Astronomy,Sun Yat-sen University,Zhuhai 519082,China;School of Mechanical and Electrical Engineering,Wenzhou University,Wenzhou 325035,China)

机构地区：[1]中山大学物理与天文学院,广东珠海519082 [2]温州大学机电工程学院,浙江温州325035

出　　处：《物理实验》2022年第5期35-40,共6页Physics Experimentation

摘　　要：高温超导陶瓷的电磁性质可以成为物理专业本科生基于实验的学习对象.同时,超导实验涉及到真空技术、低温技术、热学、电磁学等多学科,学生在通过实验学习新知识的同时,以学以致用的方式巩固已有知识,提升探索新知识的能力.在实验项目设计时拆解相关的知识点,组建对应实验装置模块并提供待探索的问题.以YBa_(2)Cu_(3)O_(7-δ)烧结陶瓷样品为例,介绍了交流磁化率表征抗磁性以及外加直流磁场对样品超导转变的影响,其中包括实验装置的设计和改进以及基于该实验装置开展实验教学的情况.Electromagnetic properties of a high temperature superconducting ceramic could be a good candidate of learning superconductivity through experiments for undergraduate students in physics.The vacuum technology,low temperature technology,thermology,electromagnetism were involved in the superconducting experiment,and so on.And thus the students’ability to explore new knowledge was enhanced by learning new knowledge from experiments and consolidating the previous knowledge by means of application.In the design of the experimental project,the relevant knowledge points were unraveled,the corresponding experimental device module was set up,and the explored problems were provided as well.Taking YBa_(2)Cu_(3)O_(7-δ)sintered ceramic samples as example,the AC susceptibility characterization of the superconductivity diamagnetism and the influence of an applied DC magnetic field on the superconducting transition were discussed,including the design and improvement of the experimental setup and the experimental teaching experience.

关 键 词：超导电性 转变温度 交流磁化率 磁场 

分 类 号：G642.423[文化科学—高等教育学] O511[文化科学—教育学]