Abstract: In this communication, La0.75Ca0.25−xNaxMnO3 (0 ≤ x ≤ 0.10) samples were synthesized by the Flux method and their structural and electrical properties were systematically undertaken. X-ray diffraction of the samples showed an orthorhombic structure with a Pbnm space group. Furthermore, to get a better understanding of the electrical properties, the resistivity ρ(T) as a function of temperature was measured by a standard four-probe method. The maximum resistivity values decreased and the insulator–metal transition temperature (TM–SC) ...
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Topics: 
Condensed matter physics