The magnetic domain structures of Nd Fe B alloys prepared by the two techniques of powder metallurgy and explosive compaction were also studied using the MFM technique.

• 并用这种技术观察了粉末烧结和爆炸压制两种工艺制备的 Nd- Fe- B合金的磁畴 ；给出了它们各自不同的畴结构特征 .