低维层状多铁性材料的构建与物性研究

项目名称： 低维层状多铁性材料的构建与物性研究

项目编号： No.51302257

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 董思宁

作者单位： 中国科学技术大学

项目金额： 25万元

中文摘要： 多铁性材料是有着最为丰富物理内涵的新型量子材料体系之一，在凝聚态基础物理研究和新型功能器件开发方面都有深远的意义，预计会在信息存储、能量转换、高精度磁电传感等领域获得应用，而探索新型层状多铁性材料则是多铁性材料研究的一个新兴热点。本项目拟开展低维层状多铁性材料的构建与物性研究，尤其关注新材料与新效应的探索。主要研究内容包括：1）设计并制备新型低维层状磁电材料，通过分析晶体生长机理、改变制备工艺，对材料的成分、晶体结构、微结构等进行有效地调控；2）系统地表征低维层状材料磁电特性，探明层状结构特征和磁电耦合效应的内在关联，建立相应的"生长条件?晶体结构?磁电特性"相图，并进一步筛选得到所研究体系中性能最优的层状多铁性材料；3）通过多种现代测量分析手段，深层次地认识多铁性低维层状材料中的表/界面效应和磁电耦合效应之间的相互作用和影响，从而发掘层状磁电材料的结构优势，设计原型功能器件。

中文关键词： 层状结构；低维；磁电耦合；调控生长；微结构

英文摘要： Multiferroic material is one of the new quantum material systems with the richest physical connotations, and has important implications for both the fundamental study of condensed matter physics and exploitation of new functional device applications. It is anticipated that multiferroics can be used in information storage, energy transfer, high-precision magnetoelectric sensing and other fields, and it is notable that exploring novel layered multiferroics is becoming a new hot issue for the multiferroic material research. In this project, the process investigations and property researches of low-dimensional layered multiferroic materials will be launched, and a particular attention will be given to the exploration of new materials and novel effects. The main researches include: 1) design and fabricate new type low-dimensional layered magnetoelectric materials, effectively control the composition, crystal structure as well as microstructure of the materials via analyzing the growth mechanism of crystals and controlling the preparation process; 2) make systematically characterizations of the magnetic and electric properties of the low-dimensional layered multiferroic materials, confirm the internal relationship between the layered structure feature and the magnetoelectric coupling effect, then establish the related

英文关键词： layered structure；low dimensional；magnetoelectric coupling；controllable growth；microstructure