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Spin Glass Dynamics of Nanoparticle La_{0.7}Ca_{0.3}Mn_{0.7}Fe_{0.3}O_3 Obtained by a Mechanochemical Milling

100%

Perovic M., Mrakovic A., Kusigerski V., Blanusa J., Spasojevic V.

issue 5

813-814

Spin dynamics of nanoparticle La_{0.7}Ca_{0.3}Mn_{0.7}Fe_{0.3}O_3 system was studied through the set of diverse magnetic measurements. Analysis of the data obtained from magnetic relaxation measurements, memory effect and AC susceptibility experiments pointed to a spin glass like behavior of interacting nanoparticle system.

Magnetism of Nanoparticle La_{0.7}Ca_{0.3}Mn_{0.7}Fe_{0.3}O_3 under Applied Hydrostatic Pressure

86%

Kusigerski V., Perovic M., Mrakovic A., Blanusa J., Mihalik M., Zentkova M., Spasojevic V.

issue 5

811-812

Nanoparticle La_{0.7}Ca_{0.3}Mn_{0.7}Fe_{0.3}O_3 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} ≈ 34 K, and ferro-to-paramagnet transition at T_{C} ≈ 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_{C} 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.

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2 Acta Physica Polonica A

2 2010

2 Blanusa J.

2 Kusigerski V.

2 Mrakovic A.

2 Perovic M.

2 Spasojevic V.

1 Mihalik M.

1 Zentkova M.

Search results

Spin Glass Dynamics of Nanoparticle La_{0.7}Ca_{0.3}Mn_{0.7}Fe_{0.3}O_3 Obtained by a Mechanochemical Milling

Magnetism of Nanoparticle La_{0.7}Ca_{0.3}Mn_{0.7}Fe_{0.3}O_3 under Applied Hydrostatic Pressure