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A systematic study of room temperature 57 Fe-Mössbauer spectra has been undertaken in the quasi-ternary system La 0.8 Sr 0.2 (Mn,Fe,Co)O 3 . The spectra exhibit a wide variety from simple to complex line shapes due to varying magnetic and/or quadrupolar interactions. Most samples are non-magnetic and show a linear variation of isomer shift vs. formal oxidation state...
The paper presents experimental results on an in situ optical absorption study of reduction/oxidation processes in YAlO 3 . The increase in the absorption of the bands at 22,000 and 40,000cm –1 during annealing in an oxidizing atmosphere as well as their bleaching during reduction were studied in YAlO 3 and YAlO 3 :Nd crystals in the temperature range 600–1000K. The...
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