Influence of Low Frequency Mechanical Vibrations on Crystal Growth of GaInSb Ternary Alloy: Growth by VDS Technique

Crystal growth of bulk GaInSb ternary alloy using vertical directional solidification (VDS) technique with controlled low frequency coupled mechanical vibrations has been investigated. Growth rate of 1.5 mm per hour, mechanical vibrations with ramp of frequency ranging from 25 Hz to 200 Hz and amplitude varying from 0.25 mm to 0.05 mm has shown the significant improvement in compositional homogeneity along axial direction. The phase formation has investigated using X-ray analysis and compositional variation investigated using EDAX. The micro cracks, lamellar crystal growth defects and ampoule cracking remains presents in vibration assisted GaInSb ternary alloy crystal grown using VDS technique.