An experimental research of the effects of stress upon the magnetic domains in magnetic memory testing

Influenced by the earth magnetic field, indirection of the domain organization and irreversible reorientation will be occurred in internal organization of the loaded ferromagnetic material. The effects of stress on the domains of silicon steel sheet and 0.20% C carbon steel, which had been loaded on the different load, the domains have been observed with the Bitter method. The results show that the silicon steel and 0.20% C carbon steel with the low load or no load, there mainly exist 180 domains, dendritic domains, gladiate domains whose walls are smaller each other in a same crystalline grain, then, with the load enhancing, the domain walls' length and space changed and there exits mazy I domains and mazy II domains, and the number of the mazy domains increase.