Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 16, Issue 50, Pages 9155-9162Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/16/50/006
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The efficient use of ferroelectric thin films in radio-frequency agile devices faces several limitations. One of them is imposed by the dielectric losses which are usually above 1%, i.e. above the threshold as set by the electronic industry. Following the same route as for bulk ceramics, we have processed composite stacks made of BST/SiO2 multilayers using radio-frequency magnetron sputtering. Doing so, we were able to repeatedly achieve dielectric losses well below 0.5% while keeping a high dielectric susceptibility and a suitable tunability. All of these improvements have been observed at low frequencies (f < 10 MHz) and the transfer to the targeted frequency range (f > 1 GHz) is currently in progress.
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