- Single crystals of BaFe12O19 are grown by solid state crystal growth.
- A single crystal up to ∼130 μm thick (c-axis direction) grows on the seed crystal.
- The single crystal and surrounding ceramic matrix have similar composition.
- Micro-Raman scattering shows the single crystal has the BaFe12O19 structure.
- Single crystal;
- Scanning electron microscopy;
- Raman scattering;
- Grain growth
Single crystals of BaFe12O19 are grown for the first time by solid state crystal growth. Seed crystals of BaFe12O19 are buried in BaFe12O19+1 wt% BaCO3 powder, which are then pressed into pellets containing the seed crystals. During sintering, single crystals of BaFe12O19 up to ∼130 μm thick in the c-axis direction grow on the seed crystals by consuming grains from the surrounding polycrystalline matrix. Scanning electron microscopy-energy dispersive spectroscopy analysis shows that the single crystal and the surrounding polycrystalline matrix have the same chemical composition. Micro-Raman scattering shows the single crystal to have the BaFe12O19 structure. The optimum growth temperature is found to be 1200 °C. The single crystal growth behavior is explained using the mixed control theory of grain growth.
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