钛酸锶钡的铁电相变与晶胞体积的关联  

A CORRELATION BETWEEN THE FERROELECTRIC PHASE TRANSITION AND THE CELL VOLUME IN BARIUM STRONTIUM TITANATE

作　　者：张磊[1] 钟维烈[1] 彭毅萍[1] 王玉国[1] 

机构地区：[1]山东大学物理系,济南250100

出　　处：《物理学报》2000年第7期1371-1376,共6页Acta Physica Sinica

基　　金：国家重点基础研究规划项目! (批准号 :G19980 614 0 4 0 6)

摘　　要：考察了BaμSr1-μTiO3 (BST)的TC 对晶格参数γ的依赖关系 .并对BST的依赖关系与BaTiO3 和SrTiO3 的相应依赖关系进行了比较 .得到了一个观点 :BST的TC 的变化可归因于晶胞体积效应 .还从体积效应的观点对BST相变的弥散性和级进行了讨论 .BST的晶胞体积效应可归因于BST中Ba和Sr的离子化现象 .The T C of Ba μ Sr 1- μ TiO 3(BST) as a function of the composition and the lattice parameter γ is examined. It is compared with the lattice parameter dependence of T C of BaTiO 3 and SrTiO 3 respectively. It is argued that the variation of T C in BST can be attributed to the change of cell volume. The order and the diffuseness of the phase transition are also discussed from the volume effect viewpoint. The fact that the Ba and Sr are ionized leads to the volume effect of BST.

关 键 词：铁电性 钛酸锶钡 晶胞体积效应 铁电体 

分 类 号：O481[理学—固体物理]