硬磁畴稳定性与垂直布洛赫线间静磁相互作用的关系

应用科学学报 ›› 1998, Vol. 16 ›› Issue (3): 291-299.

硬磁畴稳定性与垂直布洛赫线间静磁相互作用的关系

唐贵德¹, 刘英¹, 孙会元¹, 聂向富¹, 李伯臧²

1. 河北师范大学;
2. 中国科学院物理研究所和凝聚态物理研究中心

收稿日期:1997-01-09 修回日期:1997-06-19 出版日期:1998-09-30 发布日期:1998-09-30
作者简介:唐贵德:副教授,河北师范大学物理系,石家庄 050016
基金资助:
国家自然科学基金,河北省自然科学基金

Dependence of Stability of the Hard Domains on the Magnetostatic Interaction between VBLs

TANG GUIDE¹, LIU YING¹, SUN HUIYUAN¹, NIE XIANGFU¹, LI BOZANG²

1. Department of Physics, Hebei Normal University, Shijiazhuang 050016;
2. Institute of Physics and Center for Condensed Matter Physics, Chinese Acadmy of Sciences, Beijing 100080

Received:1997-01-09 Revised:1997-06-19 Online:1998-09-30 Published:1998-09-30

摘要/Abstract

摘要： 研究石榴石磁泡膜在直流偏磁场作用下布洛赫线间的静磁作用对硬磁畴稳定性的影响.一方面实验研究了圆形硬磁畴的缩灭行为和条泡转变行为以及两种行为间的关系;另一方面通过引入相邻布洛赫线间的静磁作用能,改进了圆柱形硬磁畴的畴壁能公式,从而使一些多年来一直不能解释的硬磁畴在直流偏磁场下的行为得到了统一的解释,并在此基础上提出了估算硬磁畴畴壁中垂直布洛赫线数目的方法.最后还应用经该文改进了的畴壁能公式定性地解释了部分硬磁畴种类随温度而变化的现象.

关键词: 磁泡, 磁畴壁, 布洛赫线

Abstract: The influence of the magnetostatic interaction between vertical Bloch lines (VBLs) on the stability of hard domains in garnet bubble films subjected to a magnetostatic bias field is investigated. The collapse behaviour and the stripe-to-bubble transition behaviour of circular hard domains as well as the relationship between these two behaviour are studied experimentally. The domain wall energy formula of the circular hard doamins is improved by adding a magnetostatic interaction energy term between VBLs. Then, some experimental phemomena of hard domains subjected to a bias field, which have remained unclear for many years, are interpreted qulitatively. Based on these grounds, a method is proposed for estimating the number of VBLs in the walls of hard domains. Finally, the dependence of the hard domain kinds on temperature was interpreted qualitatively by using above improved theory.

Key words: magnetic bubble, magnetic domain wall, Bloch line

唐贵德, 刘英, 孙会元, 聂向富, 李伯臧. 硬磁畴稳定性与垂直布洛赫线间静磁相互作用的关系[J]. 应用科学学报, 1998, 16(3): 291-299.

TANG GUIDE, LIU YING, SUN HUIYUAN, NIE XIANGFU, LI BOZANG. Dependence of Stability of the Hard Domains on the Magnetostatic Interaction between VBLs[J]. Journal of Applied Sciences, 1998, 16(3): 291-299.