Combinatorial synthesis and screening of (Ba,Sr)(Ti,Mn)O3 thin films for optimization of tunable co-planar waveguides
| Autor: | Samuel Guerin, Steven Gao, Xingli He, Brian E. Hayden, Ian M. Reaney, Qi Luo, Nur Zatil Ismah Hashim, C. H. Kees de Groot, Ioanna Bakaimi |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science business.industry Capacitive sensing 02 engineering and technology General Chemistry Dielectric 021001 nanoscience & nanotechnology 01 natural sciences law.invention Planar law 0103 physical sciences Materials Chemistry Optoelectronics Insertion loss Thin film 0210 nano-technology business Waveguide Microwave DC bias |
| Popis: | 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 haveidentified (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. |
| Databáze: | OpenAIRE |
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