Sound absorbtion in quantum hydrogenous ferroelectrics

Abstract

We consider the relaxational sound absorbtion and sound velooity renormalization in quantum hydrogenous ferroeleotrios. It is shown that at low temperature the absorbtion is caused by elastio and eleotric fields oreated by dipolar and charged defects. The temperature dependences of the absorbtion coeffioient and sound velooity renormalization are obtained.