Effect of Ar annealing on the magnetic and transport properties of Pr0.7Sr0.3MnO3

Magnetic susceptibility and electron magnetic resonance study of monovalent potassium doped manganites Pr0.6Sr0.4−xKxMnO3

“…In the paramagnetic phase the ΔHp-p (T) of the La0.67Sr0.33MnO3 manganites is only slightly different for the powder and single crystal whereas the pronounced split is observed below Curie temperature. An abrupt jump of ΔHp-p (T) in ferromagnetic phase reported also for polycrystalline Pr0.7Sr0.3MnO3 [31,32], appears to be characteristic for manganites.…”

Magneto-transport properties of Fe-doped LSMO manganites

“…It may be noted that the broad hump observed in q(T) is due to a bond percolation because of the broken Mn-O-Mn linkage and therefore could be well described by a temperature independent metallic volume fraction, as previously considered [21,22] also. These two resistivities, q 1 and q 2 , are temperature dependent but independent of each other.…”

“…There are several attempts [18][19][20] to explain the temperature dependence of electrical resistivity in CMR systems in terms of phase separation model, where the system has been considered as a sum of two phases: ferromagnetic-metal and paramagnetic-insulator. Another approach for interpreting electrical conduction behavior has been raised by some other researchers [21][22][23] by considering a two phase system with random distribution of phases, a phenomenological model has been developed by them based on effective medium approximation (EMA) [24,25]. This method was originally developed to explain the electrical conduction in composite materials.…”