ELASTIC STRAINS INDUCED BY ELECTRIC-FIELDS IN QUASI-CRYSTALS

The classical formulae of piezoelectric and electrostriction effects i n crystals are generalized to quasicrystals. Two types of strain (phon on strain and phason strain) induced by electric fields have been stud ied. According to group representation theory, the matrix forms of pie zoelectric and electrostriction tensors of two-dimensional pentagonal, octagonal, decagonal, dodecagonal and three-dimensional icosahedral c ubic quasicrystals are given. If one takes the external field as a mag netic field, these tensors can also be used to describe magnetoelastic effects in quasicrystals.