虚实结合的磁滞回线实验教学设计与实践

利用GPU加速的微磁学模拟软件Mumax设计了虚实结合的大学物理实验项目:磁滞回线的研究。该虚拟仿真项目解决了磁滞回线实验教学中理论不够生动形象,实验过程缺少物理内涵等问题,构建了虚实结合的教学平台,让学生能够从磁性材料微观磁畴在外磁场中的演化过程来理解磁滞回线的产生过程,虚实结合的磁滞回线实验丰富了教学内容、提高了实验教学质量。以铁磁材料的磁化过程为例,先进行实物实验操作,用示波器观测铁磁材料的磁滞回线,然后再利用Mumax微磁学模拟不同磁场下的磁畴演化过程,从微观上理解磁学概念和磁化过程。这种虚实结合的实践教学模式,激发了学生对磁性物理实验的学习兴趣,提高了学生的实验创新能力,加深了学生对磁性物理的理解,丰富了现有的实验教学模式,教学效果得到显著提高。

Mumax,a GPU-accelerated micromagnetic simulation software,was used to design a university physics experiment project combining virtual and real conditions:the study of hysteresis loops.This virtual simulation project solves the problems that the theory is not vivid enough in the experimental teaching of the hysteresis loop,and the experimental process lacks physical connotation.It builds a teaching platform combining virtual and real,so that students can learn from the evolution process of magnetic material microscopic magnetic domains in the external magnetic field.Taking the magnetization process of ferromagnetic materials as an example,the experiment was conducted to observe the hysteresis loop of ferromagnetic materials with an oscilloscope,and then Mumax micromagnetism was used to simulate the domain evolution process under different magnetic fields,to understand the magnetic concept and magnetization process from the microscopic perspective.This practical teaching mode combining virtual and real has stimulated students'interest in magnetic physics experiments,improved their experimental innovation ability,deepened their understanding of magnetic physics,enriched the existing experimental teaching mode,and significantly improved the teaching effect.