Study of shear-horizontal waves in structure “piezoelectric - viscous and conductive liquid”
* Presenting author
Recently it has been found that velocity of shear-horizontal surface acoustic waves initially increase as the conductivity of the layer located on the surface of the piezoelectric medium increases. At a certain value of conductivity the velocity of such waves reaches a maximum and with a further increase in conductivity begins to decrease. The same effect was found for conductive liquid and shear horizontal wave in piezoelectric media. In this work the influence of viscosity of a liquid on the magnitude of this effect is theoretically and experimentally studied. It was found that for surface acoustic leaky wave in 36YX lithium niobate and Bleustein-Gulyaev wave in cadmium sulfate as the viscosity of a liquid increases the value of above effect decreases and at a certain value of viscosity it disappears. As a liquid we used butil acetate characterized by low permittivity as 6. The results obtained can be useful in the development of sensors for biological fluids. Work is supported by the grants #17-51-53101 and #18-57-7802 from Russian Basic Research Foundation.