HfO2/α-Al2O3 eutectics were grown by the micro-pulling down (μ-PD) method at the composition of 63.2 mol.% α-Al2O3, 35.512 mol.% HfO2, 0.92 mol.% Eu2O3 and 0.368 mol.% Y2O3. Rod phases with around 3–4 μm diameter were observed on the transverse cross-section. The phase-separated scintillator fibers (PSSFs) structure with fibers of around 3–4 μm diameter and 10–20 μm length was observed. The electron back scattering patterns indicated crystal orientation of  for monoclinic HfO2 rod phase and  for α-Al2O3 matrix in the transverse cross-section. Eu3+ 4f-4f emission was observed at 550–750 nm.
- micro-pulling down method
- rare earths