Mostaed, A., Bakaimi, I., Hayden, B. et al. (2 more authors) (2020) Origin of improved tunability and loss in N2 annealed barium strontium titanate films. Physical Review Materials, 4 (9). 094410. ISSN 2475-9953
Abstract
Barium strontium titanate (BSTO) thin films were deposited on Pt(111) by high throughput evaporative physical vapor deposition and then annealed at 650 °C for 30 min under N2 atmosphere. Using advanced transmission electron microscopy, energy-dispersive x-ray spectroscopy and electron energy-loss spectroscopy, we directly show that not only does N substitute for O in the BSTO lattice but that it also compensates for Ti3+ ions, suppressing conductivity, thereby reducing dielectric loss and enhancing dielectric tunability. However, this effect is negated near the film edge where we speculate that exposed Pt acts as a reservoir of adsorbed/absorbed O and alters the local N2 concentration during annealing.
Metadata
Authors/Creators: |
|
||||||
---|---|---|---|---|---|---|---|
Copyright, Publisher and Additional Information: | © 2020 American Physical Society. This is an author-produced version of a paper subsequently published in Physical Review Materials. Uploaded in accordance with the publisher's self-archiving policy. | ||||||
Dates: |
|
||||||
Institution: | The University of Sheffield | ||||||
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) | ||||||
Funding Information: |
|
||||||
Depositing User: | Symplectic Sheffield | ||||||
Date Deposited: | 25 Sep 2020 13:05 | ||||||
Last Modified: | 25 Sep 2020 18:25 | ||||||
Status: | Published | ||||||
Publisher: | American Physical Society (APS) | ||||||
Refereed: | Yes | ||||||
Identification Number: | https://doi.org/10.1103/physrevmaterials.4.094410 |