Ferroelasticity in Superconducting YBa2Cu3OxSingle Crystals

Abstract
YBa2Cu3Oxsingle crystals are found to show ferroelastic behavior at about 200°C when they are heated in a mechanically clamped state. Atomic movements associated with ferroelastic domain wall motion are reasonably explained by an order-disorder model for a tetragonal-orthorhombic phase transition.