Ultrawideband microwave noise filter: Hybrid antiferromagnet/ferromagnet exchange-coupled multilayers

Abstract

Hybrid multilayers of [FeNi-FeMn]N/[MnIr-FeCo]N deposited onto flexible substrates oriented for wideband noise filters were fabricated using rf sputtering deposition. By combining the two types of multilayers with various thicknesses, where FeNi-FeMn is designed for the low frequency range and MnIr-FeCo for the high frequency range, one can realize a hybrid thin film for wideband noise filters. Its broad range from 1.5 to 7 GHz (the absorption width where the reflection loss is less than -10 dB) makes this hybrid thin film promising for future applications. © 2009 American Institute of Physics.