【摘要】 磁性材料的宏观磁性能主要是由磁畴结构及其运动变化方式所决定,因此磁畴图像的观测是一个很重要的研究课题。目前,磁畴观测的方法已有很多种,如粉纹图法、磁光效应法、电子全息法等。基于磁光法拉第效应原理,我们设计了一台数字化的磁畴动态观测仪。本文详细介绍了该仪器的测量原理、仪器组成、操作技巧及其应用等,具体给出了对石榴石型材料薄膜(YSmBi)3(FeGa)5O12磁化过程的观测结果,并且就如何进一步提高该仪器的性能进行了分析。更多还原

【Abstract】 The magnetic properties of magnetic material are mainly determined by its domain structure and the way it changes, so the observation of magnetic domain is always a very important subject. Nowadays there are many methods to observe the magnetic domain structure, including powder-pattern method, magneto-optical effect method and electron holography method, etc. Based on Faraday effect, a digital instrument has been developed for the dynamic observation of magnetic domain. The principle, constitution, operating skills and applications of the instrument are introduced in details. In addition, the observation of the magnetization process of the (YSmBi)3(FeGa)5O12 garnet magnetic film is also given. Furthermore, the methods for the improvement of this device are also given.更多还原