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

智力优势：强磁电耦合和最近在包括铁/铁磁性和铁电相的磁电复合材料方面的许多突破使这一领域非常令人兴奋。然而，磁电耦合还远远不够强，特别是用于射频/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具有微波频率下低损耗正切、大磁致伸缩常数和高磁导率的微波磁性材料。本课题的目的是：(1)研究具有大磁致伸缩常数和窄铁磁共振线宽的新型FeGaB微波磁膜；(2)利用这些FeGaB微波磁膜探索新型可调谐微波磁电复合材料和器件。该项目将产生一类全新的高磁致伸缩FeGaB微波磁膜和磁电复合材料，这将使新型的静电可调谐磁电信号处理设备成为射频/微波集成电路的关键。更广泛的影响：新型FeGaB薄膜和基于FeGaB薄膜的磁电复合材料和器件将在射频/微波集成电路上带来铁电或磁性材料单独不具备的新功能，并将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力魔术项目，对公众进行非正式教育；以及广泛的K ~研究生教育计划，包括研究生和本科教育，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.