直流偏磁场对第二类哑玲畴长度的影响

本文通过研究直流偏磁场Ｈｂ对标称成份为（ＹＳｍＣａ）３（ＦｅＧｅ）５Ｏ１２石榴石磁泡材料中第二类哑铃畴（ＩＤ）长度的影响，观察到：１）ＩＤ的长度随Ｈｂ的升高而缩短；２）经过直流偏场从低到高两次大幅度地准静态升降，ＩＤ长度与Ｈｂ的关系曲线基本重合；３）随着Ｈｂ的升高，直至ＩＩＤ缩灭的过程中，较长ＩＤ与较短ＩＤ的长度比变化不大．这些实验现象暗示，在Ｈｂ的准静态变化过程中ＩＤ畴壁中的垂直布洛赫线（ＶＢＬ）数目保持不变

INFLUENCE OF THE STATIC BIAS MAGNETIC FIELD ON THE LENGTH OF THE SECOND KIND OF DUMBBELL DOMAINS

On the basis of studying the influence of the static bias magnetic field H b on the length l of the second kind of dumbbell domains in the garnet bubble film with the nominal composition (YSmCa) 3(FeGe) 5O 12 , the following phenomena were observed: 1) the length of IID shortenes as H b is increased; 2) after H b is changed for large range two times, the curves l vs H b aproximately coincide; 3) as H b is increased, until IID collapse, the ratio of the longer IID to the short one aproximately equals a constant. These phnomena suggest that the number of VBL in the wall of IID is a constant among the process of the quasistatic change of H b .