Consideration of Small Variation of Surface Acoustic Wave (SAW) Velocity in Lithium Tetraborate

It has been experimentally revealed that the variation of surface acoustic wave (SAW) velocity in lithium tetraborate crystals is smaller than that in other SAW crystals. This may relate to the small deviation of lattice constant due to the little change in chemical composition of the wafer. Such homogeneity can be explained by the specific compositional properties of Li 2 B 4 O 7 crystal and its melt.