Polat, O.Coskun, M.Yildirim, Y.Coskun, F. M.Durmus, Z.Sen, C.Caglar, Y.2024-07-182024-07-1820240947-83961432-0630https://doi.org/10.1007/s00339-024-07335-8https://hdl.handle.net/11411/7113The solid-state reaction technique was employed to synthesize compounds of YMnO3 (YMO) and YMn1-xCoxO3 (YMCO) with various Co doping levels (x = 0.01, 0.10, 0.20, and 0.40), where Co atoms partially substituted Mn sites. XRD studies confirmed the presence of two phases, YMO and Y0.98CoO3 (YCO), for doping ratios above x = 0.10. Additionally, an increase in crystalline size was observed with cobalt substitution. Surface characteristics of synthesized pellets were examined using scanning electron microscopy (SEM), revealing a less porous structure with cobalt doping. XPS analysis elucidated valence states, showing the presence of both Mn3+ and Mn4+, as well as Co2+ and Co3+. The x = 0.20 and 0.40 Co-doped samples exhibited lower grain and grain boundary energies compared to other samples, such as a decrease from 0.556 eV (undoped) to 0.195 eV (x = 0.20). Moreover, the dielectric constants of x = 0.20 and 0.40 cobalt-doped samples (around 320) significantly surpassed the undoped sample (around 22) at 10(6) Hz and 100 degrees C. The x = 0.20 cobalt-doped sample demonstrated the highest conductivity at 100 degrees C and 10(6) Hz (31 x 10(-4) S/cm). FT-IR analysis provided insights into vibration and bending modes, and frequency- and temperature-dependent electrical features were investigated. It was observed that a single conduction model is insufficient to fully explain the conduction mechanism in these samples.eninfo:eu-repo/semantics/closedAccessYmno3Co DopingSolid-State ReactionDielectric ConstantConductivityJahn-Teller DistortionElectrical-PropertiesMagnetic-StructureCrystal-StructureAc ConductionRelaxationEvolutionMagnetoresistanceSubstitutionBehaviorArticle2-s2.0-8518509906410.1007/s00339-024-07335-83Q2130N/AWOS:001161091900001