Dielectric and magnetic properties of YIG/PMMA nanocomposites

Abstract

Yittrium iron garnet, Y<inf>3</inf>Fe<inf>5</inf>O<inf>12</inf> (YIG), is a material used widely in electronic devices for the microwave region as well as the magnetic bubble domain-type memories. Yittrium iron garnet (Y <inf>3</inf>Fe<inf>5</inf>O<inf>12</inf>) was produced by mechanochemical synthesis from Y<inf>2</inf>O<inf>3</inf> and Fe<inf>2</inf>O<inf>3</inf> with particle size of around 150 nm. PMMA/YIG composite films were prepared by solution casting method at diffferent concentration (i.e. 10%, 20% and 40%) of YIG filler. Dielectric permitivity of composite materials were studied over a wide a range of frequency and temperature as a function of filler concentration. The electrical properties of composites were explained by in terms of molecular mobility and interfacial polarization. © 2009 IOP Publishing Ltd. © 2018 Elsevier B.V., All rights reserved.