摘要
用电子全息技术测量了掺铌∑ 13[0 0 1]钛酸锶倾转双晶界面的电势场分布。结果显示掺杂前界面处的Schottky势垒已消失。表明铌原子占据了界面处氧离子空位 ,消除了电荷聚集在界面处的分布状态。有选择性地掺杂金属元素可以补偿晶界面固有的内禀缺陷 。
Potential distribution at the ∑13tilt boundary of strontium titanate bicrystal doped with niobium has been measured using hig resolution electron holograph Schottky grain boundary bariers at the boundary examined in the case of the undoped strontium titanate was eliminated due to niobium atoms occupying the vacancies of oxygen at the grain boundary core,which removed the charge accumulation at the boundary Elimination of Schottky grain boundary bariers suggests that the intrinsic ionic defects at the grain boundary could be modified by extrinsic dopant additions The resultant characteristics of the macroscopic electric properties of strontium titanate bicrystal coincided to the linear response of ionic or electronic charge carriers to an applied voltage
出处
《金属功能材料》
CAS
2002年第1期29-32,共4页
Metallic Functional Materials