Converse method measurements of electrostriction coefficients in low-K dielectrics

Methods for measuring electrostrictive coefficients are discussed and a set of converse method measurements on low-K dielectrics presented. The Q11 values measured in this work, in m4/C2, range from −0.49 for CaF2 through smaller values like 0.34 for MgO up to 1.48 for BeO. Coefficients for BaF2, SrF2, KMnF3, Al2O3, LiF, spodumene (Li2O·Al2O3·4SiO2) glass, and calcite (CaCO3) are also presented. The separated Qij coefficients measured before in good agreement with confirmed measurements available in the literature. Most of the non-cubic samples have been measured here reliably for the first time. A simple ion-chain model of electrostriction is also presented, and the results compared to experimental values of the hydrostatic electrostriction coefficient Qh.