High-frequency signal processing using magnetic layered structures |
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Authors: | R.E. Camley Z. Celinski T. Fal A.V. Glushchenko A.J. Hutchison Y. Khivintsev Bijoy Kuanr I.R. Harward V. Veerakumar V.V. Zagorodnii |
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Affiliation: | Center for Magnetism and Magnetic Nanostructures, University of Colorado at Colorado Springs, Colorado Springs, CO 80933-7150, USA |
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Abstract: | We present a review of theoretical and experimental results for tunable microwave band-stop filters, band-pass filters, phase shifters, and a signal to noise enhancer, all based on a microstrip geometry and using a variety of magnetic thin films and layered structures. These devices are compatible in size and growth process with on-chip high-frequency electronics. For devices based on metallic ferromagnetic films of Fe and Permalloy, the operational frequency ranges from 5 to 35 GHz for external fields below 5 kOe. For the band-stop filters, we observed power attenuation up to ∼100 dB/cm, and an insertion loss on the order of ∼2-3 dB, for both Permalloy and Fe-based structures. We also explore the use of thin films of hexagonal ferrites, antiferromagnets, and liquid crystals, and show that useful devices can be constructed with films less than one 1 μm in thickness. |
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Keywords: | Ferromagnetic resonance Magnetic multilayer Polariton Signal processing GHz |
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