PREPARATION OF BARIUM LEAD HEXA-ALUMINATE SINGLE-CRYSTAL LAYERS BY THE LIQUID-PHASE EPITAXY TECHNIQUE

In this paper we show that it is possible to grow the hexagonal material (Ba, Pb)Al1 2O1 9 on single crystal substrates by the liquid phase epitaxy technique. The layers have been characterized using optical microscopy and X-ray topography. We show that the quality of films grown on c-orientated substrates are of good quality, whilst those grown on α-orientated substrates suffer from cleavage cracks perpendicular to the c-direction. Chemical analysis was done using the electron probe microanalysis and electron excitation techniques. In this study the flux PbO/PbF2 was used. After about one week the high evaporation rate of the PbF2 at ≈ 1000°C lead to irreproducible growth. © 1979.