Cuenca, Jerome A. ORCID: https://orcid.org/0000-0003-1370-1167, Mandal, Soumen ORCID: https://orcid.org/0000-0001-8912-1439, Stritt, Jaspa, Zheng, Xiang, Pomeroy, James, Kuball, Martin, Porch, Adrian ORCID: https://orcid.org/0000-0001-5293-8883 and Williams, Oliver A. ORCID: https://orcid.org/0000-0002-7210-3004 2024. Dielectric properties of diamond using an X-band microwave split dielectric resonator. Carbon 221 , 118860. 10.1016/j.carbon.2024.118860 |
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Abstract
This work presents an easy-to-use microwave split dielectric resonator (MSDR) for X-band dielectric measurements of free-standing unpolished poly-crystalline diamond (PCD). PCD grown with varying CH 4 /H 2 and O 2 / CH 4 /H 2 in the gas phase show stark differences in dielectric loss. Low microwave dielectric loss PCD is found for CH 4 /H 2 concentrations of less than 5% while PCD grown with O 2 show very high loss tangents. Vacuum annealing introduces non-diamond carbon (NDC) impurities which increases the loss, however, even after significant discolouration the loss is still lower than the O 2 grown PCD. The loss mechanism of O 2 grown PCD is likely due to a high concentration of grain boundaries and grain boundary hopping conduction mechanisms as opposed to high concentrations of NDC impurities.
Item Type: | Article |
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Date Type: | Publication |
Status: | Published |
Schools: | Engineering Physics and Astronomy |
Additional Information: | License information from Publisher: LICENSE 1: URL: http://creativecommons.org/licenses/by/4.0/, Start Date: 2024-01-25 |
Publisher: | Elsevier |
ISSN: | 0008-6223 |
Funders: | EPSRC |
Date of First Compliant Deposit: | 30 January 2024 |
Date of Acceptance: | 24 January 2024 |
Last Modified: | 16 Apr 2024 08:17 |
URI: | https://orca.cardiff.ac.uk/id/eprint/165910 |
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