Elastic Constants of Strontium Titanate (SrTiO3)

The elastic constants of strontium titanate (SrTi${\mathrm{O}}_3$) were measured by the compound resonator method. Oriented quartz cylinders were used as drivers to excite the sample cylinders. The measured values for the compliance constants are $s_{1111}=3.3\mathrm{}\times {10}^{-13\mathrm{}}$ ${\mathrm{cm}}^2$ ${\mathrm{dyne}}^{-1\mathrm{}}$, $s_{1122}=-0.74\mathrm{}\times {10}^{-13\mathrm{}}$ ${\mathrm{cm}}^2$ ${\mathrm{dyne}}^{-1\mathrm{}}$, and $4s_{1212}=8.4\mathrm{}\times {10}^{-13\mathrm{}}$ ${\mathrm{cm}}^2$ ${\mathrm{dyne}}^{-1\mathrm{}}$. The elastic behavior of SrTi${\mathrm{O}}_3$ is found not to be entirely analogous to that of BaTi${\mathrm{O}}_3$.