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dc.contributor.authorPolat, Özgür
dc.contributor.authorCoşkun, M.
dc.contributor.authorCoşkun, F. M.
dc.contributor.authorDurmuş, Zehra
dc.contributor.authorÇağlar, Müjdat
dc.contributor.authorTurut, Abdulmecit
dc.date.accessioned2018-07-24T09:46:28Z
dc.date.available2018-07-24T09:46:28Z
dc.date.issued2018-04-05
dc.identifier.issn0925-8388
dc.identifier.other1873-4669
dc.identifier.urihttps://doi.org/10.1016/j.jallcom.2018.01.022
dc.identifier.urihttps://hdl.handle.net/11413/2297
dc.description.abstractPerovskite oxide materials, especially perovskite lanthanum chromium oxide, LaCrO3 (LCO) have taken considerable attention among the scientists due to the changing optical, electrical, dielectric and magnetic properties depending on doping via various elements. In this study, the LCO and iridium (Ir) doped LCO (LaCr1-xIrxO3) (x = 0.10) compounds were synthesized using solid-state reaction method. Scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS) have been employed to study particle morphologies and oxidation states of synthesized powders, respectively. Frequency-depended electrical/dielectric properties of perovskite oxide samples were performed in wide range frequency (1Hz-10 MHz) and temperature (-100 degrees C to +100 degrees C) using dielectric/impedance spectrometer. Electrical measurements have underscored that the dielectric constant of LCO compound dramatically decreased after doped with Ir. Furthermore, it was observed that ac conductivity and capacitance value of LCO decreased while impedance increased after Ir doping due to i) Ir occupation in Cr sites and ii) lattice distortion owing to doping larger ion Ir4+ into smaller Cr3+ ion in the LCO lattice. Finally, overlapping large polaron tunneling (OLPT) and quantum mechanical tunneling (QMT) conduction mechanisms were suggested for LCO while the correlated barrier hopping (CBH) and QMT conduction mechanisms were observed for Ir doped LCO compound. Moreover, the activation energy values have been calculated by employing both f(max) vs. 1/T and sigma(dc) vs. 1/T plots. It has been shown those energy values are in good agreement with each other for LCO and Ir doped LCO samples at various temperature ranges. (C) 2018 Elsevier B.V. All rights reserved.tr_TR
dc.language.isoen_UStr_TR
dc.publisherElsevier Science Sa, Po Box 564, 1001 Lausanne, Switzerlandtr_TR
dc.relationJournal of Alloys and Compoundstr_TR
dc.subjectLaCrO3tr_TR
dc.subjectIrtr_TR
dc.subjectDielectric propertiestr_TR
dc.subjectConductivitytr_TR
dc.subjectImpedance spectroscopytr_TR
dc.subjectOxide Fuel-Cellstr_TR
dc.subjectImpedance Spectroscopytr_TR
dc.subjectOptical-Propertiestr_TR
dc.subjectConductivitytr_TR
dc.subjectCotr_TR
dc.subjectElectroceramicstr_TR
dc.subjectNanoparticlestr_TR
dc.subjectSubstitutiontr_TR
dc.subjectStabilitytr_TR
dc.subjectCeramicstr_TR
dc.titleFrequency and temperature dependent electrical and dielectric properties of LaCrO3 and Ir doped LaCrO3 perovskite compoundstr_TR
dc.typeArticletr_TR
dc.contributor.authorID110485tr_TR
dc.contributor.authorID21994tr_TR
dc.contributor.authorID3726tr_TR


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