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The Influence of Intrinsic Water and Ion Permeation on the Dielectric Properties of Parylene C Films

https://doi.org/10.1109/jerm.2023.3285049

Pawlik, Jacob T. ; Barrera, Nikolas D. ; Yoon, Eugene J. ; Booth, James C. ; Long, Christian J. ; Orloff, Nathan D. ; Meng, Ellis ; Stelson, Angela C. ( July 2023 , IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology)

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Targeted chemical pressure yields tuneable millimetre-wave dielectric

https://doi.org/10.1038/s41563-019-0564-4

Dawley, Natalie M. ; Marksz, Eric J. ; Hagerstrom, Aaron M. ; Olsen, Gerhard H. ; Holtz, Megan E. ; Goian, Veronica ; Kadlec, Christelle ; Zhang, Jingshu ; Lu, Xifeng ; Drisko, Jasper A. ; et al ( February 2020 , Nature Materials)

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Sub‐Nanosecond Tuning of Microwave Resonators Fabricated on Ruddlesden–Popper Dielectric Thin Films

https://doi.org/10.1002/admt.201800090

Hagerstrom, Aaron M. ; Lu, Xifeng ; Dawley, Natalie M. ; Nair, Hari P. ; Mateu, Jordi ; Horansky, Robert D. ; Little, Charles A. E. ; Booth, James C. ; Long, Christian J. ; Schlom, Darrell G. ; et al ( July 2018 , Advanced Materials Technologies)

Abstract
Voltage‐tunable dielectric materials are widely used for microwave‐frequency signal processing. Among tunable dielectric thin films, (SrTiO₃)_nSrO Ruddlesden–Popper (RP) superlattices have exceptionally low loss at high frequencies. This paper reports the first realization of resonators, a ubiquitous building block of microwave components, fabricated on RP films, and an analysis of their static and dynamic tuning behavior. The RP film has a ferroelectric‐paraelectric phase transition at ≈200 K, and the tunability is strongest at this temperature. The resonators have approximately 2.5% tuning of the resonance frequency at room temperature and 20% tuning at 200 K, and a tuning time scale of less than a nanosecond, which is limited by the measurement circuit rather than material properties.

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