An enhancement ZT and spin state transition of Ca3Co4O9 with Pb doping

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dc.authoridDemirel, Serkan/0000-0003-1158-4956
dc.authoridALTIN, Serdar/0000-0002-4590-907X
dc.authoridAltin, Emine/0000-0002-2187-4036
dc.authorwosidALTIN, EMINE/AHE-9774-2022
dc.authorwosidbayri, ali/AAA-5966-2021
dc.authorwosidDemirel, Serkan/AAA-2133-2020
dc.authorwosidOz, Erdinc/GXW-0937-2022
dc.authorwosidALTIN, Serdar/H-4880-2014
dc.contributor.authorDemirel, S.
dc.contributor.authorAltin, E.
dc.contributor.authorOz, E.
dc.contributor.authorAltin, S.
dc.contributor.authorBayri, A.
dc.date.accessioned2024-08-04T20:40:00Z
dc.date.available2024-08-04T20:40:00Z
dc.date.issued2015
dc.departmentİnönü Üniversitesien_US
dc.description.abstractWe reported the structural, electrical, thermal and magnetic properties of Pb-doped Ca3Co4O9 in the range of 300-5 K. DTA analysis showed that the stability of the Ca3Co4O9 was increased with Pb doping. According to XRD analysis, it is found that Pb ions were successfully doped in the Ca3Co4O9 structure. The temperature of resistivity minima, T-min, increased by increasing the Pb doping level and it is seen that incommensurate spin density wave state becomes more stable with Pb doping. The enhancement of thermopower was explained that Pb doping in Ca sites caused a decrease of Co4+ fraction such that Co4+ ions transformed into Co3+ or Co2+. The room temperature ZT value of the polycrystalline sample reaches about 16 times larger value than that of the un-doped polycrystalline sample which is the promising candidate for high temperatures in the thin film applications. According to magnetic susceptibility measurement, the increase of effective magnetic moment by Pb concentration was explained by spin state transition of Co3+ from low spin to intermediate spin and high spin state together with some orbital angular momentum contribution which comes from T-5(2) term due to a decrease of the ligand field splitting energy. (C) 2014 Elsevier B. V. All rights reserved.en_US
dc.description.sponsorshipInonu University Research Council [BAP-2013-76]en_US
dc.description.sponsorshipThis study was supported by Inonu University Research Council under Contract Number BAP-2013-76.en_US
dc.identifier.doi10.1016/j.jallcom.2014.11.200
dc.identifier.endpage437en_US
dc.identifier.issn0925-8388
dc.identifier.issn1873-4669
dc.identifier.scopus2-s2.0-84920749595en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage430en_US
dc.identifier.urihttps://doi.org/10.1016/j.jallcom.2014.11.200
dc.identifier.urihttps://hdl.handle.net/11616/96654
dc.identifier.volume627en_US
dc.identifier.wosWOS:000348504800061en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofJournal of Alloys and Compoundsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCa3Co4O9en_US
dc.subjectPb-dopingen_US
dc.subjectThermopoweren_US
dc.titleAn enhancement ZT and spin state transition of Ca3Co4O9 with Pb dopingen_US
dc.typeArticleen_US

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