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dc.contributor.authorCoşkun, Merve
dc.contributor.authorPolat, Özgür
dc.contributor.authorCoşkun, Fatih Mehmet
dc.contributor.authorDurmuş, Zehra
dc.contributor.authorÇağlar, Müjdat
dc.contributor.authorTurut, Abdulmecit
dc.date.accessioned2018-07-25T08:59:22Z
dc.date.available2018-07-25T08:59:22Z
dc.date.issued2018
dc.identifier.issn2046-2069
dc.identifier.urihttps://doi.org/10.1039/c7ra13261a
dc.identifier.urihttps://hdl.handle.net/11413/2328
dc.description.abstractWe have prepared LaCrO3 (LCO) and 10% Ir doped LCO samples by the solid state reaction method and studied the electrical modulus and the other dielectric properties of the samples by means of the impedance spectroscopy in the -100 degrees C to 100 degrees C range, with steps of 20 degrees C. It has been clearly observed that the dielectric properties change due to Ir doping. The absolute dielectric constant value of Ir doped LCO has decreased and this reduction was attributed to decreasing Cr6+ ions which may play a vital role in space charge polarization and charge hopping. A plateau region appeared in the temperature-dependent real electrical modulus M' versus f curves of the pure LCO sample while almost no plateau region is visible in the Ir doped LCO sample. The temperature-dependent imaginary modulus M" versus f curves has two peaks at each temperature; one of the peaks is at low frequency and the other at the high frequency region, which shifts through higher frequency region with increasing temperature. This originates from free charge accumulation at the interface with the increase of the temperature. Furthermore, it has been seen that the Ir doped LCO sample has higher impedance and resistance values than the undoped LCO sample at the same frequency and temperature. This phenomenon was attributed to doped Ir ions behaving like a donor in LCO because LCO is a p-type compound. Moreover, the activation energy values of 0.224 eV and 0.208 eV for LCO and of 0.161 eV and 0.265 eV for the Ir doped LCO have been obtained from the slopes of the rho(dc) vs. (kT)(-1) curves, respectively. Also the activation energies were calculated from the slopes of the f(ma)x vs. (kT)(-1) curves and the obtained results from low frequency region were in good agreement with rho(dc) vs. (kT)(-1) ones.tr_TR
dc.language.isoen_UStr_TR
dc.publisherRoyal Soc Chemistry, Thomas Graham House, Science Park, Milton Rd, Cambridge Cb4 0Wf, Cambs, Englandtr_TR
dc.relationRSC Advancestr_TR
dc.subjectOxide Fuel-Cellstr_TR
dc.subjectThermoelectric Propertiestr_TR
dc.subjectElectronic-Structuretr_TR
dc.subjectHigh-Temperaturetr_TR
dc.subjectSingle-Crystaltr_TR
dc.subjectValence Statetr_TR
dc.subjectThin-Filmstr_TR
dc.subjectCeramicstr_TR
dc.subjectConductıvitytr_TR
dc.subjectBehaviortr_TR
dc.titleThe electrical modulus and other dielectric properties by the impedance spectroscopy of LaCrO3 and LaCr0.90Ir0.10O3 perovskitestr_TR
dc.typeArticletr_TR
dc.contributor.authorID110485tr_TR
dc.contributor.authorID48508tr_TR
dc.contributor.authorID108339tr_TR
dc.contributor.authorID21994tr_TR
dc.contributor.authorID3726tr_TR
dc.identifier.wos423898000016
dc.identifier.wos423898000016en
dc.identifier.scopus2-s2.0-85041209338
dc.identifier.scopus2-s2.0-85041209338en


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