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The impact of lanthanum doping on the microstructure and colossal permittivity in BaxSr(1-x)TiO3 |
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| Author: | Nurmi, Kari1; Jantunen, Heli1; Juuti, Jari1 |
| Organizations: |
1Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, P.O. Box 4500, FIN-90014, Oulu, Finland |
| Format: | article |
| Version: | published version |
| Access: | open |
| Online Access: | PDF Full Text (PDF, 2.3 MB) |
| Persistent link: | http://urn.fi/urn:nbn:fi-fe2021090745295 |
| Language: | English |
| Published: |
Elsevier,
2021
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| Publish Date: | 2021-09-07 |
| Description: |
AbstractIn this work BaSrTiO3 with three different Ba/Sr (45/55, 55/45 and 65/35) ratios and lanthanum doping concentrations of 0, 0.2, 0.4 and 0.6 mol.% were studied. Samples were fabricated through the mixed oxide route. The microstructures were analyzed and the phases of the compositions were defined by XRD. The increase in lanthanum doping had a pronounced decreasing effect on the grain size. The temperature dependent dielectric characteristics were measured between 0.1 and 1000 kHz in the temperature range of -68–150 °C. Colossal permittivity was found in all doped samples with a Ba/Sr ratio of 65/35 from which the 0.6 mol. % doping level of lanthanum showed the most promising characteristics with relative permittivity >48,000 and a dielectric loss ≤0.06 over the whole temperature range below 1 kHz. It was found that the relaxation of the colossal permittivity effect exhibited a frequency shift at the Curie temperature. see all
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| Series: |
Open ceramics |
| ISSN: | 2666-5395 |
| ISSN-L: | 2666-5395 |
| Volume: | 6 |
| Article number: | 100120 |
| DOI: | 10.1016/j.oceram.2021.100120 |
| OADOI: | https://oadoi.org/10.1016/j.oceram.2021.100120 |
| Type of Publication: |
A1 Journal article – refereed |
| Field of Science: |
213 Electronic, automation and communications engineering, electronics |
| Subjects: | |
| Funding: |
Authors Jari Juuti and Kari Nurmi gratefully acknowledges funding of the Academy of Finland (decision No. 267573, 298409 and 318203). Author K. N. gratefully acknowledges Tauno T€onning foundation for financial support. |
| Academy of Finland Grant Number: |
267573 298409 318203 |
| Detailed Information: |
267573 (Academy of Finland Funding decision) 298409 (Academy of Finland Funding decision) 318203 (Academy of Finland Funding decision) |
| Copyright information: |
© The Authors 2021. Published by Elsevier Ltd on behalf of European Ceramic Society. his is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
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https://creativecommons.org/licenses/by-nc-nd/4.0/ |