基于多铁异质结的高频磁电微波器件研究

项目名称： 基于多铁异质结的高频磁电微波器件研究

项目编号： No.51472199

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 刘明

作者单位： 西安交通大学

项目金额： 83万元

中文摘要： 针对当前多铁研究领域亟待解决的器件应用转化问题，结合项目申请人的前期工作基础，选择可用于军事领域的高频微波信号处理器作为研究对象，从器件参数要求和结构设计出发，构建复合多铁性磁电异质结及滤波器原型器件,探索多铁材料与高频微波器件的系统整合方法、理论模型和测试平台,研究器件中氧化物/金属/氧化物外延异质结的生长机制及其强磁电耦合的内在机理，并建立相应数学预测模型。利用仿真计算，研究异质结磁电特性对滤波性能参数的影响，并用于指导和优化器件的结构设计和开发。在保证器件功能最大化的基础上，充分利用其外延生长所致牢固的界面机械耦合与异质结中强磁电耦合及其各向异性，实现电场（或脉冲电压）非易失性原位调控铁磁共振及滤波频率，进一步增大其频率调制范围，并保持小的共振线宽和灵敏度。成功地设计并开发新一代低功耗、微型化、低噪声、超快响应的新型高频磁电微波器件具有重要的国防安全意义。

中文关键词： 多铁性；磁电耦合；铁电性；多铁异质结；磁电器件

英文摘要： Aiming to resolve the current challenge of realizing prototype devices in multiferroic applications, we proposed to create novel epitaxial multiferroic heterostructures and deliver energy-efficient tunable microwave filters, which satisfy all the structural and performance requirements of being a high frequency and wide band signal processing system. The proposed novel heterostructures and devices will be investigated from different aspects, including the system integration between the magnetoelectric (ME) interaction and the filter design, the new mechanism behind the combination of both systems, and the novel platform for device operation and performance evaluation. As a crucial technique in this proposal, we use novel epitaxial refractory transition metal nitride (TMN) as the top electrode for the ME components and the conductive ground plane for the filters. The epitaxial growth of ferrite/TMN/ferroelectric heterostructures, which enables a strong mechanical coupling at interface, will be comprehensively studied. The ME coupling in the system will be experimentally and theoretically explored. In addition, the microwave performance as a function of magnetoelectric properties will be investigated and utilized to optimize the device design and fabrication. Given the strong interface mechanical coupling due to the epitaxial growth, as well as the anisotropic ME coupling in the heterostructure, voltage or electric impulse induced non-volatile control of the ferromagnetic resonance and the cut-off frequency in ME filters will be realized with the significant enhancment in the frequency tunable range, while the filter's sensitivity and magnetic loss remain the same. The successful development of the next generation of high-performance, frequency-agile microwave electronics in a lightweight, energy efficient format shows great prospects for the military related applications and significantly contributes to the National Security.

英文关键词： Multiferroics;Magnetoelectric Coupling;Ferroelectricity;Multiferroic heterostructures;Magnetoelectric devices