Journal of the Physical Society of Japan · 1979 · 81 citations · 14 references
Natural SciencesChemistryMaterials ScienceInorganic ChemistryMagnetic MaterialsSpectroscopyCurie TemperatureFerromagnetismMagnetic CharacterizationMagnetic OxidesMagnetic Properties Of SolidsMagnetism Of Inorganic CompoundsCurie Temperature DeterminationHyperfine Structure In Magnetic FieldsLanthanide Magnetic PropertiesLanthanide MagnetismMagnetic Hyperfine SplittingMagnetic Materials CharacterizationMagnetic Property CharacterizationTemperature-dependent Magnetization
Magnetization measurements and 55 Mn NMR study of a system with the nominal formula LaNi 1- x Mn x O 3 (0.0 ≤ x ≤0.5) were made. It was found that materials with 0.03 ≤ x ≤0.5 are mixtures of a Pauli paramagnet LaNiO 3 and a ferromagnet LaNi 0.5 Mn 0.5 O 3 . The Curie temperature of LaNi 0.5 Mn 0.5 O 3 was found to be 275 K. In this material, strong 55 Mn NMR signals associated with Mn 4+ were observed. The observed hyperfine magnetic fields are about -260 kOe, which is considerably smaller than the ones observed for the Mn 4+ ions in other oxides. This smallness of the value seems to be due to the supertransferred hyperfine magnetic fields from the neighboring Ni 2+ ions.
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