Understanding the charge carriers dynamics in the La <sub>0.55</sub> Ca <sub>0.45</sub> Mn <sub>0.8</sub> Nb <sub>0.2</sub> O <sub>3</sub> perovskite: scaling of electrical conductivity spectra
Y. Moualhi, M. Smari, H. Rahmouni
Abstract
ceramic is attributed to the effect of the variable range hopping conduction process. The application of the time-temperature-superposition-principle and the Summerfield scaling formalisms leads to the superposition of the isotherms. Using the Ghosh formalism, the superposition of the spectra confirms that the number density and the hopping distance are temperature-dependent. The superposition of the spectra suggested the temperature-independent relaxation and polaronic processes. In addition, it confirms that the relaxation mechanism is independent of the microstructure response.
Topics & Concepts
Variable-range hoppingPolaronPerovskite (structure)Superposition principleMaterials scienceCondensed matter physicsConductivitySpectral lineArrhenius equationChemistryCrystallographyElectronPhysical chemistryPhysicsActivation energyAstronomyQuantum mechanicsMagnetic and transport properties of perovskites and related materialsElectronic and Structural Properties of OxidesAdvanced Thermoelectric Materials and Devices