Modification of the Charge ordering in Pr$_{1/2}$Sr$_{1/2}$MnO$_{3}$   Nanoparticles
  Transport and magnetic properties have been studied in two sets of sol-gel prepared Pr$_{1/2}$Sr$_{1/2}$MnO$_{3}$ nanoparticles having average particle size of 30 nm and 45 nm. Our measurements suggest that the formation of charge ordered state is largely affected due to lowering of particle size, but the ferromagnetic transition temperature ($T_{C}$) remains unaffected. 
Anis Biswas, I. Das and Chandan Majumdar