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Rietveld analysis for . The sets of ticks refer, respectively, from top to bottom, to P6/mmm, , and .
HRTEM micrograph of , annealed at during . Inset: FFT image.
Hysteresis loops of annealed at .
Coercive field, at room temperature vs annealing temperature in for indicated values.
and cell parameters, , and and factors from Rietveld fit for .
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