界面动态磁电效应的研究

项目名称： 界面动态磁电效应的研究

项目编号： No.11474138

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 贾成龙

作者单位： 兰州大学

项目金额： 90万元

中文摘要： 磁电效应，因电/磁有序的共存及相互之间的强耦合，为未来高位、低能耗、多场可控自旋电子学器件的实现和应用提供了广阔的前景。本项目以界面磁电效应的动态性质为目标，通过对复合多铁性异质结构界面性质的细致分析，探索（静电屏蔽、应力、交换作用等）界面效应主导磁电耦合的微观机制及其动力学响应特性，开展多铁性动力学与多场可控磁电输运的理论研究。通过这些研究，期望对电荷-自旋-轨道等多物理自由度之间的相互作用有更为深入的理解和认识，为多场可控自旋电子学器件的发展提供重要的理论参考。

中文关键词： 磁电效应；自旋动力学；界面效应；磁电输运

英文摘要： Magnetoelectric effect, implying coexistence and strong coupling between ferroelectric and magnetic properties, bears the great potential for a wide range of qualitatively new concepts in spintronic devices, as for instance multistate memory devices with fast low-power heterogeneous read/write capability. In this project, we will focus on the magnetoelectric dynamics at ferromagnetic(FM)/dielectric interface. Through exploring proximity and magnetoelectric properties between dissimilar FM/dielectric heterostructures with possible enhanced multiferroicity at room temperature, several mechanisms may underlay the magnetoelectric effect, for example interfacial charge rearrangements, strain effects, and exchange interaction are studied as the key ingredients for interfacial multiferroic. To further characterize the magnetoelectric effects, (ultra-)fast multiferroic dynamics and multi-field-controllable magnetotransport properties will be theoretically addressed as well. Hence, in addition to the relevance for very promising steps towards the fabrication of multiferroic devices, an attractive feature of studying interfacial magnetoelectric effects is that it may reveal extra information and have insight into the underlying charge-spin-orbit coupling mechanisms.

英文关键词： Magnetoelectic Effect;Spin dynamics;Interface Effect;Magnetotransport