反钙钛矿Mn3AX异质结制备与电、磁物性研究

项目名称： 反钙钛矿Mn3AX异质结制备与电、磁物性研究

项目编号： No.51472017

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无机非金属材料学科

项目作者： 孙莹

作者单位： 北京航空航天大学

项目金额： 80万元

中文摘要： 近年来，反钙钛矿Mn3AX(X=N或C, A=Cu, Zn, Ga, Ni等)化合物由于具有巨磁阻、巨磁致伸缩、压磁、反常热膨胀、零电阻温度系数等丰富的物性，引起学术界的广泛关注。开展异质结的研究是将这些物性应用到智能器件中的重要途径，在晶格、自旋、电荷强关联耦合的基础上，反钙钛矿异质结由于界面作用很有可能会产生新的效应，因此该研究具有重要的学术价值和应用前景。本课题将围绕反钙钛矿/反钙钛矿和反钙钛矿/钙钛矿异质结的设计与调控，系统研究该类异质结在电场、磁场、温度、压力等外场下的物性变化规律，期望通过材料组分选择、界面设计等实现具有特定功能（如磁阻、静磁电效应、整流特性等）的异质结。在此基础上，深刻认识该异质结独特物性的起源和调控机制，并重点探讨反钙钛矿和钙钛矿界面复杂的耦合作用及其诱导的新物性。该研究不仅能够加强我们对强关联电子体系的认识，还将为探索新型智能器件提供新的思路和理论依据。

中文关键词： 反钙钛矿；异质结；功能材料

英文摘要： In recent years,antiperovskite Mn3AX(X=N or C,A=Cu,Zn,Ga,Ni,etc.) compounds have attracted lots of attention due to the discovery of giant magnetoresistance, giant magnetostriction, piezomagnetic effect, near zero thermal expansion, near zero temperature coefficient of resistance, and so on. The research of antiperovskite heterojunction is desired for the application of the physical properties in smart devices. Based on the strong coupling effect among lattice, spin and charge, antiperovskite heterojunction may also exhibit new physical properties due to the introduction of interface. So this study has important academic value and application prospects. Focusing on the design and control of antiperovskite/antiperovskite and antiperovskite/perovskite heterojunction, this research will study systematically the physical properties of this kind of heterojunction under different external field including electric field, magnetic field, temperature, pressure, and so on. We expect to achieve specific function (e.g. rectifying characteristics,magnetoresistance, static magnetoelectric effect, etc.) heterojunction by selection of material component and design of interface. On this basis, we will further understand the origin of the particular physical properties in depth, and focus on the complex interface coupling effect between antiperovskite and perovskite compounds. This study will not only strengthen our understanding of strongly correlated electron systems, and also provide new ideas and theoretical basis for exploring new smart devices.

英文关键词： Antiperovskite;Heterojunction;Functional materials