面内场对枝状畴形成的IID畴壁中VBL链的影响  

The Influence of In-plane Field on Vertical-Bloch-line Chains in the Walls of Second Kind of Dumbbell Domains Produced by Multi-branched-domains

作　　者：顾建军[1] 李秀玲[2] 张丽娇[2] 孙会元[2] 

机构地区：[1]承德民族师范高等专科学校,河北承德067000 [2]河北师范大学物理学院,河北石家庄050016

出　　处：《河北师范大学学报（自然科学版）》2004年第6期590-592,共3页Journal of Hebei Normal University：Natural Science

基　　金：国家自然科学基金资助项目(10274018);河北省教育厅科学研究基金资助项目(002013);河北师范大学重点学科资助项目(120203)

摘　　要：实验研究了面内场作用下枝状畴形成的第2类哑铃畴(IID)畴壁中垂直布洛赫线(VBL)链的解体过程.发现存在一个与材料参量有关的临界面内场范围[H(0)ip对应IID畴壁中垂直布洛赫ip,H(1)ip],其中H(0)线链保持稳定的最大临界面内场,H(1)ip对应IID畴壁中垂直布洛赫线链完全解体的最小临界面内场.此外,实验发现不同低直流偏场下产生的枝状畴在面内场作用下的软化过程相同,且在这个临界面内场范围内畴壁中的VBL是逐步丢失的.同时实验结果也证明了枝状畴畴壁中VBL是随机分布的.Annihilation procession of vertical-Bloch-line chains in the walls of second kind of dumbbell domains produced by multi-branched-domains subjected to an in-plane field was investigated experimentally.A critical in-plane field range[H^((0))_(ip),H^((1))_(ip)]for vertical-Bloch-line(VBL)annihilation is found.H^((0))_(ip) is the minimum critical in-plane field of VBL_s which keeps on stable,H^((1))_(ip) is the minimum critical in-plane field which only needs to be applied one time for collepse of all VBL.The annihilation procession of VBL_s in the walls of multi-branched-domains which was formed by different low static bias fields is the same.Meanwhile,the VBL_s in the walls gradually annihiated in the critical in-plane field range [H^((0))_(ip),H^((1))_(ip)]And we draw a conclusion that VBL exists in the walls stochastic.

关 键 词：临界面内场 垂直布洛赫线 VBL 哑铃畴 直流偏场 随机分布 证明 过程 最大 范围 

分 类 号：O484.43[理学—固体物理] O482[理学—物理]