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Issue 23, 2018
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Combinatorial synthesis and screening of (Ba,Sr)(Ti,Mn)O3 thin films for optimization of tunable co-planar waveguides

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Abstract

The identification and optimization of tunable dielectric materials exhibiting low loss characteristics in the GHz frequencies are essential in the development of low power devices for microwave applications. We have applied a combinatorial synthetic methodology employing multiple atomic evaporative sources to produce compositional gradient thin film (Ba,Sr)(Ti,Mn)O3 perovskites. High throughput screening chips of both capacitive and waveguide structures are used to measure the compositional dependence of the dielectric properties of the fully characterised thin film materials. The co-planar waveguides are shown to allow measurements at frequencies exceeding 10 GHz. Using this methodology, we have identified (Ba,Sr)(Ti,Mn)O3 compositions which exhibit good tunability with low losses at microwave frequencies: for a single device with a 10 V DC bias one can achieve a 12° phase shift with excellent transmission characteristics, and an insertion loss of ∼3.2 dB. We show that small changes in composition can result in a significant change in dielectric characteristics and device performance, and that the experimental protocol developed provides a powerful methodology for the development of materials and microwave devices.

Graphical abstract: Combinatorial synthesis and screening of (Ba,Sr)(Ti,Mn)O3 thin films for optimization of tunable co-planar waveguides

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Publication details

The article was received on 23 Mar 2018, accepted on 13 May 2018 and first published on 14 May 2018


Article type: Paper
DOI: 10.1039/C8TC01396A
Citation: J. Mater. Chem. C, 2018,6, 6222-6228
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    Combinatorial synthesis and screening of (Ba,Sr)(Ti,Mn)O3 thin films for optimization of tunable co-planar waveguides

    I. Bakaimi, X. He, S. Guerin, N. Z. I. Hashim, Q. Luo, I. M. Reaney, S. Gao, B. E. Hayden and C. H. K. de Groot, J. Mater. Chem. C, 2018, 6, 6222
    DOI: 10.1039/C8TC01396A

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