实验研究了顺时针、逆时针转动的哑铃畴(ID,IID)畴长与缩灭场的关系.结果显示,顺时针转动和逆时针转动的哑铃畴的缩灭场明显不同.对于同样畴长的ID,IID,顺时针转动的缩灭场高,较稳定,对应负的VBL;逆时针转动的缩灭场低,不稳定,对应正的VBL.实验首次验证了正、负布洛赫线模型是合理的. The relationship between the dumbbell domain ID (ID, IID) domain length and the shrinkage field was investigated experimentally.The results show that the dumbbell domain shrinkage field is obviously different from the clockwise rotation and the counterclockwise rotation, The ID, IID, the systolic field rotating clockwise, more stable, corresponding to the negative VBL; the anticlockwise rotating systolic field is low, unstable, corresponding to the positive VBL. For the first time, the positive and negative Bloch lines The model is reasonable.