The effect of electronic phase segregation in a broad metal-Insulator transition (MIT) observed in La0.75Ca0.25-xSrxMnO3 (x=0.1) composition is investigated using heat capacity, magnetization, electrical resistivity and magnetoresistance measurements. The negative magnetoresistance of 65% in an applied magnetic field of 12T and 15% in 1T with a broad working range of 18K around 300K which is beneficial for room temperature colossal magnetoresistance (CMR) applications. The broad transition in temperature dependent zero field resistivity measurement is analyzed in the light of percolation model indicates the abundance of insulating/metallic clusters in metallic/insulating region. A significant difference between the metallic fraction around the MIT and the ferromagnetic phases observed around the Curie temperature demonstrates the interplay between volume of itinerant and polaronic electronic phases.
|Book series||Journal of Physics: Conference Series (Online)|
|Number of pages||4|
|Publication status||Published - 2014|
|Event||International Conference on Recent Trends in Physics (ICRTP 2014) - Indore, India|
Duration: 22 Feb 2014 → 23 Feb 2014
|Conference||International Conference on Recent Trends in Physics (ICRTP 2014)|
|Period||22/02/2014 → 23/02/2014|