Elastic properties of ${\mathrm{Bi}}_2$${\mathrm{Sr}}_2$${\mathrm{CaCu}}_2$${\mathrm{O}}_{\mathit{x}}$ whiskers

This study reports vibrating-reed measurements of Young’s modulus and internal friction made as a function of temperature, from 50–400 K, on single-crystal whiskers of ${\mathrm{Bi}}_2$ ${\mathrm{Sr}}_2$ ${\mathrm{CaCu}}_2$ ${\mathrm{O}}_{\mathit{x}}$ with ${\mathit{T}}_{\mathit{c}}$≊75 K. The modulus along a is found to be lower than any earlier reported value for this material. Comparisons are made to results of previous work conducted by different methods and on platelet samples with higher ${\mathit{T}}_{\mathit{c}}$.