Vincent Harris

Biography:

Vincent Harris (B.Sc., M.Sc., Ph.D., M.Sc., M.Eng.) has had a distinguished career as an engineer, scientist, inventor, educator, and entrepreneur for nearly three decades. He presently holds positions as University Distinguished Professor and William Lincoln Smith Chair at Northeastern University. He is the Founder and Director of the Center for Microwave Magnetic Materials and Integrated Circuits and Metamagnetics Inc. Prior to holding these positions, he was a member of the technical staff, Head of the Complex Materials Section, and Head of the Materials Physics Branch at the Naval Research Laboratory (Washington, DC). During 2008-2010, he held a guest appointment at the Naval Postgraduate School (Monterey, CA USA) as Professor of the National Security Institute. His research interests include materials design and the study of processing, structure and magnetism in a wide range of electronic materials and devices used principally in high frequency applications such as sensors, radar and communication systems and platforms. He has published more than 380 technical articles (>13,000 citations) in peer-reviewed science and engineering journals, including book chapters, review articles, and invited technical feature articles on the topical areas of nanotechnology, magnetism, and RF materials and devices. He has been elevated to Fellow of the AAAS, IEEE, American Physical Society, and the Institute of Physics (UK). In 2016, Harris served as a Fulbright Fellow.

Abstract:

Magnetoceramics are insulating magnetic materials that offer high performance and a means to break time reversal symmetry at RF frequencies. As such, these materials provide non-reciprocal performance in RF isolators and circulators among other devices. Here, we present a review of the basic principles of modern magnetoceramics in the context of next generation RF device electronics including self-biased circulators/isolators, and filters and phase shifters.
Starting from a material science perspective, the chemistry, structure, and super-exchange magnetism of magnetoceramics will be discussed. Following this, the role of intrinsic material properties upon functional RF device performance will be presented, including coercivity, magnetic anisotropy, FMR linewidth, magnetism, and device isolation and insertion loss. Additionally, the methods used to process magnetoceramics into usable RF device materials, such as manipulating magnetic anisotropy using crystallographic texture and the integration of ferrite materials onto lattice matched semiconductor substrates, will be reviewed.