Mahamdioua, NabilAmira, AbderrezakBoudjadja, YazıdSaoudel, AbdelmalekAltıntaş, Sevgi PolatVarilci, AhmetTerzioğlu, Cabir2021-06-232021-06-2320160921-45261873-2135https://doi.org/10.1016/j.physb.2016.07.011https://hdl.handle.net/20.500.12491/8641Magneto-conductive mechanisms and properties of La1.2Re0.2Ca1.6Mn2O7 (Re = La, Pr, Y, Gd and Eu) have been investigated. In the low temperature range, combining residual resistivity, weak localization effect, electron electron and electron phonon interactions in a model, fit well the resistivity curves of undoped, Pr-doped and Y-doped samples. The Gd-doped and Eu-doped ones require the introduction of the small polaron metallic conduction. In the high temperature range, 3D-Mott's variable range hopping (3D-VRH) is the best model to fit resistivity of the undoped, Pr-doped and Y-doped samples, while Effros-Shklovskii model (ES-VRH) is the best one for Gd-doped and Eu-doped samples. In the entire temperature range, the percolation model fit well the resistivity. Using 3D-VRH model, the density of state (DOS) decreases with doping by Gd and Eu, whereas mean hopping distance R-h(T) and mean hopping energy E-h(T) increase. This may explain the resistivity increase and the crossover to the ES-VRH model. Values of R-h(T) vary between 1.811 and 1.030 nm, which allow us to suggest 3D-VRH as the best model fitting current results. E-h(T) values range from 0.1157 to 0.2635 eV. The DOS increases as increasing magnetic field while R-h(T) and E-h(T) decrease, which is in agreement with the observed decrease of resistivity.eninfo:eu-repo/semantics/closedAccessDouble Layered ManganiteHopping MechanismsDensity of StateMean Hopping EnergyMean Hopping DistanceArticle10.1016/j.physb.2016.07.0115007784WOS:000384020000014Q3