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

智能优点：强大的磁电耦合和最近在包含铁/铁磁和铁电相的磁电复合材料方面的许多突破使该领域非常令人兴奋。然而，磁电耦合还远远不够，尤其是用于射频/微波信号处理设备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，它具有微波频率下的低损耗正切、大的磁致伸缩常数和高磁导率的综合性能。本项目的目的是：(1)研究具有大磁致伸缩常数和窄铁磁共振共振线宽的新型FeGaB微波磁性薄膜；(2)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，这将使新型静电可调磁电信号处理器件成为射频/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本身所不具备的新功能，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性魔术计划，对普通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，为本科生、高中生和教师提供研究经验，强调代表不足的群体，特别是女性和少数族裔的参与。

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.