Magnetism of Nanoparticle La0 7Ca0 3Mn0 7Fe0 3O3 under Applied Hydrostatic Pressure

Abstract

Nanoparticle La0 7Ca0 3Mn0 7Fe0 3O3 with the average particle size of 10 nm was mechanochemically synthesized in the single-step procedure Temperature and field dependences of magnetization were recorded under both ambient and applied hydrostatic pressure up to 0 47 GPa At ambient pressure, two magnetic transition points were observed one of the spin-glass like type at the temperature T-f approximate to 34 K, and ferro-to-paramagnet transition at T-C approximate to 51 K Under the applied pressure magnetic parameters gradually changed (i) both T-C and T-f were lowered with the increase in pressure, (ii) both high field magnetization M-5T and remanent magnetization M-Rem decreased with pressure, (iii) coercivity H increased with pressure The obtained results show that magnetism of a nanoparticle system with high degree of Intrinsic disorder diminishes with the applied pressure that is in compliance with the effect of the increased cationic disorder (internal pressure) in bulk manganites