Strain and domain evolution in YBa2Cu3Oz

摘要: Abstract A Monte Carlo study of the time evolution atomic positions and occupancies within basal plane YBa2Cu3Oz is performed. The simulations are based upon an anisotropic Ising model, and, for first time, include elastic interactions associated with continuous displacements atoms plane. Samples quenched to temperatures below disorder-order transition curve from disordered tetragonal state rapidly form orthorhombic domains separated by twin boundaries. resulting microstructure observed coarsen eventually anneal into a single domain that exhibits experimentally 21/2 0 × superlattice reflections. Strain maps used elucidate interpret these observations.