Fe ion doping effect on electrical and magnetic properties of La0.7Ca0.3Mn1−xFexO3 (0 ≤ x ≤ 1)

Here we report the structural, electrical and magnetic properties of Fe doped La0.7Ca0.3Mn1−xFexO3 (LCMFO; 0 ≤ x ≤ 1) prepared by conventional solid state reaction method. Simulated data on XRD shows an increase in volume with an increase in Fe ion concentration. XPS supports that Fe3+ ions directly substitute Mn3+ ions. Shifting towards lower wave number and symmetric IR band structure confirms increase in volume and homogeneous distribution of Fe ions. Fe ion does not contribute in double-exchange (DE) conduction mechanism due to its stable half filled 3d orbital. The presence of Fe3+ ions encourages anti-ferromagnetism (AFM) generated by super-exchange interaction and suppress insulator–metal transition temperature (TIM). Magnetic measurements show the existence of magnetic polarons supported by increase in volume of unit cell and deviation from Curie–Weiss law.