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- W2057207815 abstract "Abstract Ca 0.9 Gd 0.1 MnO 3 nanopowders with perovskite type crystal structure were synthesized by modified glycine nitrate procedure. Nanopowders were prepared by combining glycine with metal nitrates and/or metal acetates in their appropriate stoichiometric ratios. Modification of the procedure was performed by partial replacement of nitrates by acetates, in order to control the burn-up reaction. Obtained Ca 0.9 Gd 0.1 MnO 3 powders were calcinated in the temperature interval from 850 °C to 950 °C for 10 min. Properties such as phase evolution, lattice parameters, chemical composition and magnetic properties were monitored by DTA, X-ray diffraction, SEM/EDS and magnetic measurements. Magnetic measurements performed at the sample with the smallest crystallite size showed that a 10% of Gd 3+ substituted Ca 2+ ions changes antiferromagnetic properties of CaMnO 3 by the introduction of ferromagnetic interaction due to a double exchange between Mn 3+ and Mn 4+ ions. Presence of competing interactions and their randomness lead to a formation of a spin glass state below Neel temperature T N = 110 K. From the high temperature magnetic susceptibility measurements effective magnetic moment of manganese ions is determined which lies between the values for Mn 3+ and Mn 4+ ions." @default.
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- W2057207815 date "2011-05-01" @default.
- W2057207815 modified "2023-09-22" @default.
- W2057207815 title "Synthesis, structural and magnetic properties of nanostructured Ca0.9Gd0.1MnO3 obtained by modified glycine nitrate procedure (MGNP)" @default.
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- W2057207815 doi "https://doi.org/10.1016/j.ceramint.2010.12.015" @default.
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