源自软磁畴段的布洛赫线链行为研究

The behavior of vertical-Bloch-line chains originating from a group of soft domain segments

在从1967-1992年连续25年研制固态磁存储器的故事中,中国没有缺席。1970年代初,中国科学院物理研究所磁学室磁泡组11个人从生长基片单晶,制备单晶磁泡薄膜和进行磁泡测量三方面开始磁泡材料的研制。当时文章作者负责测量,设计制作了磁泡测量装置。为了表征磁泡薄膜,发现了含有"一盘"软磁畴段的H图形,并找到了"脉冲偏磁场作用下硬磁泡的形成"的研究课题。这使作者在1980年代初经受住了磁泡下马的冲击,迎来了1983年布洛赫线存储器方案的提出,发觉已具有研究其机理的条件,最终成为该存储器的终结者,并在1991年国际J.Mag.Mag.Mater.杂志第100纪念卷中荣幸地为"China"占了一席之地。从1992年以来,时间又过去了25年,但活生生的磁泡总在,当年报废的磁泡测量装置已经更新。盼望大学生和刚入门的研究者喜欢这台能显示赏心悦目的磁泡畴运动,能生动阐述铁磁学物理基础的研究导向性的物理实验设备。

In the story of the worldwide investigation and fabrication of solid magnetic memories during the period from 1967 to 1992, China was not absent. In the early 1970＇s, eleven people in the group of magnetic bubbles at the Institute of Physics, Chinese Academy of Sciences, began to investigate garnet bubble films. At that time the author was responsible for measuring the films, and thus designed and constructed a bubble measurement apparatus. To characterize these films, a group of soft magnetic segments, the so-called H pattern, was found, and a project to foma hard bubbles by pulsed bias fields was established. This enabled the author to withstand the impact of the decision to abandon magnetic bubble memory research in the early 1980＇s, and then to learn the vertical-Bloch-line memory scheme put forward in 1983. The scheme made the author realize that we already had the conditions to study its mechanism, and, as a result, our papers signaled the end ofvertical-Bloch-line memories. Finally, we were invited to present a review for the 100th com- memorative volume of the Journal ofMagn. Magn. Mater： in 1991; the article was one of the total of 32 invited reviews and the only one signed ＂China＂. Since 1992, 25 years have passed. However, the lively bubble domains still exist and the once scrapped bubble apparatus has been renovated. It is hoped that college students and those newly entering the field of magnetism and magnetic materials will enjoy this research-orientated apparatus, which can show the vibrant moving bubbles and be used to explain the fundamental theories of ferromagnetism.