Abstract

We reported the effect of 2% ‘Ga’ doping in Mn site and the effect of size reduction on magnetic properties of Pr0.63Ca0.37Mn0.98Ga0.02O3 nano manganites prepared by sol-gel route. The interesting features we have observed are: The emergence of ferromagnetic phase upon 2% ‘Ga’ doping in antiferromagnetic Pr0.63Ca0.37MnO3 bulk sample and the disappearance of charge order peak upon size reduction in Pr0.63Ca0.37Mn0.98Ga0.02O3 nano manganites. The role of local counter distortion introduced by Ga doping in the appearance of ferromagnetic phase and the enhanced surface pressure preventing the formation of charge order phase in nanosamples is discussed. The occurrence of ferromagnetic transition is further confirmed by hysteresis measurement.