Temperature dependence of the lattice constant of the most common high temperature superconductors, manganites and typical substrates used for the epitaxy
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SAT1-x:LAx and SAT:LA:CAT
- Crystallization processes using the Czochralski and floating zone methods were performed on more than thirty compositions.
- The growth processes by the Czochralski method were carried out in an iridium crucible 40 mm in diameter at the pulling rate of 1÷2 mm/h and a rotation rate of 20 rpm in a pure nitrogen atmosphere (the oxygen conc. in the outlet gas was <1000 ppm).
- Good quality single crystals 18 mm in diameter were grown using seeds oriented along the <111> and <100> crystallographic directions.
- The solid solution single crystals with compositions along the SAT0.6LA0.4-CAT0.6LA0.4 line were dark yellow, along the SAT0.7LA0.3-CAT0.7LA0.3, CAT1-xLAx and SAT1-xLAx (at 0.23< x < 0.36) were bright yellow and the others were colorless.
- crystals grown by the Czochralski method - crystals grown by the floating zone method - melt compositions from which the multi-phase boules were grown by the Czochralski method; - rod compositions from which the multi-phase boules were grown by the floating zone method C – cubic, T – tetragonal, O – orthorhombic structure | |
SrLaAlO4 and SrLaAl0.9Ga0.1O4
SrLaAlO4 (SLA) crystals with K2NiF4 structure were grown by the Czochralski method on (1 0 0) oriented seed