On the temperature coefficient of delay for surface acoustic waves in LiIO3

Previously predicted values for the temperature coefficient of delay (TCD) for surface acoustic waves (SAW) in lithium iodate (LiIO3) have been found to be in error. TCD has been obtained experimentally for Z-cut LiIO3and qualitative agreement with theoretical calculations using revised elastic constant data has been obtained. The metallized SAW velocity and a measure of the electromagnetic to acoustic coupling have also been obtained experimentally for Z-cut and are in qualitative agreement with previous calculations. Z-cut is still the most attractive cut with zero power flow angle and coupling more than one and a half times that of LiNbO3, however its TCD is more than three times that of LiNbO3.