Structural distortion and dielectric permittivities of KCoO2-type layered nitrides Ca1–xSrxTiN2

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dc.contributor.authorLu, SLen_AU
dc.contributor.authorWang, YHen_AU
dc.contributor.authorLu, FQen_AU
dc.contributor.authorFeng, Jen_AU
dc.contributor.authorLin, Ken_AU
dc.contributor.authorXu, DMen_AU
dc.contributor.authorAvdeev, Men_AU
dc.contributor.authorLiu, LJen_AU
dc.contributor.authorKuang, XJen_AU
dc.contributor.authorXing, XRen_AU
dc.date.accessioned2021-07-14T04:41:23Zen_AU
dc.date.available2021-07-14T04:41:23Zen_AU
dc.date.issued2020-07-03en_AU
dc.date.statistics2021-07-06en_AU
dc.description.abstractAmong the KCoO2-type phases, the orthorhombic layered nitride CaTiN2 is a newly reported high dielectric permittivity material (εr ∼ 1300–2500 within 104–106 Hz from 80 to 450 K) while the tetragonal SrTiN2 is reported to display an unintentional metallic conduction property. In this work, a Ca1–xSrxTiN2 solid solution was synthesized, in which the insulating SrTiN2 end member and some Sr-doped CaTiN2 samples were successfully obtained, and therefore, the dielectric properties of the Ca1–xSrxTiN2 solid solution were investigated. The Sr substitution for Ca drove an orthorhombic-to-tetragonal phase transformation in Ca1–xSrxTiN2, which reduced the dielectric permittivity significantly. The tetragonal SrTiN2 displays a much lower dielectric permittivity (εr ∼ 20–70 in 105–106 Hz and 10–300 K) than that of CaTiN2. The comparison on the dielectric permittivities and structures of CaTiN2 and SrTiN2 indicates that the structural distortion arising from the splitting of N planes between Ti layers within the TiN2 pyramidal layers could be a plausible structural origin of the high bulk dielectric permittivity of CaTiN2. © 2020 American Chemical Societyen_AU
dc.identifier.citationLu, S., Wang, Y., Lu, F., Feng, J., Lin, K., Xu, D., Avdeev, M., Liu, L., Kuang, X., & Xing, X. (2020). Structural distortion and dielectric permittivities of KCoO2-type layered nitrides Ca1–xSrxTiN2. Inorganic Chemistry, 59(14), 9693-9698. doi:10.1021/acs.inorgchem.0c00931en_AU
dc.identifier.issn1520-510Xen_AU
dc.identifier.issue14en_AU
dc.identifier.journaltitleInorganic Chemistryen_AU
dc.identifier.pagination9693-9698en_AU
dc.identifier.urihttps://doi.org/10.1021/acs.inorgchem.0c00931en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11058en_AU
dc.identifier.volume59en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectPhase transformationsen_AU
dc.subjectLayersen_AU
dc.subjectElectrical propertiesen_AU
dc.subjectCeramicsen_AU
dc.subjectElectrical insulatorsen_AU
dc.subjectNitridesen_AU
dc.titleStructural distortion and dielectric permittivities of KCoO2-type layered nitrides Ca1–xSrxTiN2en_AU
dc.typeJournal Articleen_AU
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