Atomic-Scale Studies of Ferro Electrics

铁电学的原子尺度研究

• 批准号: 9203460
• 负责人: Donald Ellis
• 金额: $ 27.42万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-15 至 1995-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9203460&HistoricalAwards=false
• 关键词: Atomic; Scale; Studies; Ferro; Electrics

This proposal outlined a combined theoretical and experimental program of atomic-scale studies of ferroelectric ceramic materials, such as lead zirconium titanate (PZT) and tin-doped compounds (PSZT). 17O NMR/NQR measurements will determine electric field gradients as a microscopic probe of the local electronic structure. Electronic structure calculations in the framework of Local Density theory will be used to help interpret these measurements. The influence of doping on the ferroelectric to antiferroelectric transition will be investigated. %%%% This proposal combines the theoretical and experiemtnal studies to investigate the effect of doping on ferroelectrics such as PZT and PSZT. Local electronic structure will be carefully studied. Electric field gradients as measured from NMR/NQR measurements will be interpreted with the help of calculations from the Local Desity theory.

该建议概述了一个结合理论和实验 铁电陶瓷材料原子尺度研究计划， 例如锆钛酸铅（PZT）和掺锡化合物 （PSZT）。17 O NMR/NQR测量将确定电场 梯度作为局部电子结构的微观探针。 局域密度框架下的电子结构计算 理论将被用来帮助解释这些测量。 的 掺杂对铁电-反铁电材料的影响 将对转型进行研究。 %%%% 本研究将理论研究与实验研究相结合， 研究掺杂对铁电体如PZT的影响， PSZT。 局部电子结构将被仔细研究。 从NMR/NQR测量中测得的电场梯度将 在当地密度计算的帮助下进行解释 理论