Impact of Magneto-Electric Materials and Devices on Tactical Radio (and Radar); Final rept. 15 Jun 2006-14 Jan 2007

摘要

The interest in incorporating ME materials in electronic devices has been reinvigorated by the promising electric-field based control of magnetization or magnetization-based control of polarization in monolithic materials. Primary screening of ME monolithic materials based on their ferroelectric and magnetic ordering temperatures indicate they are not ready for application in devices and require further investment. Thus attention turned toward composite-based materials that magnetoelectrically couple through a strain field, which have known and beneficial properties, operate at room temperature or higher and can be modeled in a quasi-static fashion. While these composite materials may exhibit acceptable tunability and loss at low frequencies, strain nonuniformities, fabrication sensitivity, and proper evaluation of high frequency performance are still limitations. HFSS modeling to evaluate high frequency performance proved difficult because it cannot account for non-uniform magnetic fields nor magnetostrictive strain effects. Because of these current limitations, we recommend continued funding for ME materials research and for development of modeling and engineering expertise to realize the potential of these novel materials.