Manifestation of electron-phonon, -electron, and -magnon resistivity of La0.7Ca0.25K0.05MnO3 manganites

An investigation designed to exhibit the resistivity behaviour of La0.7Ca0.25K0.05MnO3 manganites by formulating an effective inter-ionic interaction potential (EIoIP) with long-range Coulomb, van der Waals interaction and the short-range repulsive interaction within the Hafemeister and Flygare approach to determine the Debye and Einstein temperature. The results obtained reveal that the resistivity mechanism is not only dominated by electron-phonon scattering, but also by electron-electron and electron-magnon scattering process in the ferromagnetic metallic state. On the other hand, in high temperature regime (T > TP) the semiconducting nature is discussed with small polaron conduction (SPC) model. (author)