The Combined Effects Of Temperature And Plane Id Domain The Wall Vbls Stability

The ultra-high-density Bloch Line Memory (BLM) scheme was proposed by S.Konish in 1983. Vertical Bloch line pairs (VBLP) in the walls of stripe domains are used as information carriers in BLM in which the presence and absence of VBL is represented by "1" and "0", respectively. So the study of the stability of the VBL in the hard domain walls is very important to the study of BLM and the development of magnetic domain wall physics.In 1970s, our country started to study in this field, especial the department of hebei normal university and the physic of the Chinese Academy of Science. They made a study about the produce > annihilate and the stability of temperature of the VBL in the domain walls, and gained a series of production, for example: the new classify method of hard bubble had brought forward; the critical temperature T0 of the VBL in the hard domain walls annihilated and the critical temperature T01 of the VBL in the hard domain walls uncompressed annihilated, all this has made a sense of the study about magnetic domain wall physics and the manufacture of the BLM.Thought the stability of Vertical Bloch lines (VBL) in the hard domain walls has much meaning to the use of the BLM, the in-plane field is the drive field about the use of the BLM, and also is the one of important factors about the stability of the VBL, the department of hebei normal university and the physic of the Chinese Academy of Science have study the behavior of the three hard domains produced by means of the series bias pulse method, they found that there exist a critical in-plane field range [Hip(1)(T), Hip(2)(T)] related with the material, in this rang , the VBL in the hard domains were annihilated gradually. In the same time, in order to give the BLM a best condition of temperature, the stability of temperature of the VBL in the hard domains must be studied, there were lots of useful conclusion. But the stability of the VBL in the hard domains under the influence of both temperature and in-plane fields is not investigated experimentally, so it can perfect the magnetic domain wall physic and have benefit for the BLM.The stability of Vertical Bloch lines (VBL) in the domain walls of the first kind of dumbbell domains (ID) in garnet bubble films under both temperature and in-plane field is investigated experimentally. It is found that there exists a critical in-plane field range[Hip(1)(T),Hip(2)(T)] of the VBL annihilation in the walls of ID at various temperatures from room temperature to To. When HipHip(2)(T), the VBL in the domain walls of ID annihilate completely. The range [Hip(1)(T), Hip(2)(T)] decreases with the increase in temperature, while the values of Hip(1)(T)and Hip(2)(T) decrease too, and reach zero at T0 and T0 respectively.In order to explain the annihilation of the VBL in the walls of three hard domains, we also give a experiment about the OHB, compare with the annihilation of the VBL in the walls of the first dumbbell domain, there also exist a critical in-plane field range [Hip(1)(T), Hip(2)(T)] related with the material. So the annihilation mechanism of the VBL in the domain walls of the two domains, accordingly, we can conclude that the second dumbbell domain has a same case.