Novel Tunable Microwave Magnetoelectric Composite Materials and Devices with Metallic Magnetic Thin Film Materials

智力优势：强磁电耦合和许多最近的突破磁电复合材料包括铁/铁磁和铁电相，使这一领域非常令人兴奋。然而，磁电耦合远不够强，特别是对于用于RF/微波信号处理器件的微波磁电复合材料。这是由于缺乏一种合适的微波磁性材料，该材料具有微波频率下的低损耗角正切、大磁致伸缩常数和高磁导率的组合特性。本项目的主要目的是：（1）研究具有大磁致伸缩常数和窄铁磁共振线宽的新型FeGaB微波磁性薄膜;（2）利用这些FeGaB微波磁性薄膜探索新型可调谐微波磁电复合材料和器件。该项目将导致一类全新的高磁致伸缩FeGaB微波磁性薄膜和磁电复合材料，这将使新型的静电可调磁电信号处理设备的RF/微波集成电路的关键。更广泛的影响：新型FeGaB薄膜和FeGaB薄膜基磁电复合材料及器件将为射频/微波集成电路带来铁电或磁性材料所不具备的新功能，对许多行业和社会产生重大影响。教育计划包括为波士顿科学博物馆建立磁魔法计划，以非正式地教育公众;以及一个广泛的K ~研究生教育计划，包括研究生和本科生教育，本科生、高中生和教师的研究经验，强调代表性不足的群体，特别是妇女和少数民族的参与。

Intellectual Merit: The strong magnetoelectric coupling and the many recent breakthroughs in magnetoelectric composites comprising both ferri/ferromagnetic and ferroelectric phases have made this area extremely exciting. However, the magnetoelectric coupling is far from strong enough, particularly for the microwave magnetoelectric composites used in RF/microwave signal processing devices. This is due to the lack of a suitable microwave magnetic material with combined properties of low loss tangent at microwave frequencies, large magnetostriction constant and high permeability. The purposes of this project are: (1) to investigate novel FeGaB microwave magnetic films with large magnetostriction constant and narrow ferromagnetic resonance linewidth; and (2) to explore novel tunable microwave magnetoelectric composite materials and devices with these FeGaB microwave magnetic films. This project will lead to a whole new class of highly magnetostrictive FeGaB microwave magnetic films and magnetoelectric composite materials, which will enable novel electrostatically tunable magnetoelectric signal processing devices critical for RF/microwave integrated circuits. Broader Impacts: The novel FeGaB films and FeGaB films based magnetoelectric composite materials and devices will lead to new functionalities on RF/microwave integrated circuits that ferroelectric or magnetic materials alone do not possess, and will have great impacts on many industries and on society. The education plan includes establishing the Magic of Magnetism program for the Museum of Science, Boston for informally educating the general public; and an extensive K ~ graduate education plan including graduate and undergraduate education, research experiences for undergraduates, high school students and teachers, emphasizing participation of underrepresented groups, particularly women and minorities.