4.6 Article

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

Journal

APPLIED PHYSICS LETTERS
Volume 94, Issue 9, Pages -

Publisher

AMER INST PHYSICS
DOI: 10.1063/1.3094881

Keywords

antiferromagnetic materials; cobalt alloys; exchange interactions (electron); ferromagnetic materials; iridium alloys; iron alloys; magnetic microwave devices; magnetic multilayers; manganese alloys; microwave filters; nickel alloys; ultra wideband technology

Funding

  1. Defense Science and Technology Agency of Singapore

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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.

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