Magnetism of Nanoparticle La0.7Ca0.3Mn0.7Fe0.3O3 under Applied Hydrostatic Pressure
V. Kusigerskia, M. Perovica, A. Mrakovica, J. Blanusaa, M. Mihalikb, M. Zentkovab and V. Spasojevic a
a Condensed Matter Physics Laboratory, Vinca Institute, University of Belgrade, POB 522, 11001 Belgrade, Serbia
bInstitute of Experimental Physics, Slovak Academy of Sciences, 04001 Kosice, Slovak Republic
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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 Tf ≈ 34 K, and ferro-to-paramagnet transition at TC ≈ 51 K. Under the applied pressure magnetic parameters gradually changed: (i) both TC and Tf were lowered with the increase in pressure; (ii) both high field magnetization M5T and remanent magnetization MRem decreased with pressure; (iii) coercivity HC 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.
DOI: 10.12693/APhysPolA.118.811
PACS numbers: 75.50.Tt, 75.75.-c, 81.07.Bc