The dynamics of the ortho-II oxygen structure in a high purity YBa2Cu3O6+x, single crystal with x=0.50 has been studied by neutron and by X-ray diffraction with a photon energy of 100 keV. Our data show that the oxygen order develops on two different time-scales, one of the order of seconds and a much slower of the order of weeks and months. The mechanism dominating the slow time-scale is related to oxygen diffusion, while the fast mechanism may result from a temperature-dependent change in the average oxygen chain length.
|Issue number||part 2|
|Publication status||Published - Aug 1997|
|Event||5th International Conference on Materials and Mechanisms of Superconductivity, High Temperature Superconductors - Beijing, China|
Duration: 28 Feb 1997 → 4 Mar 1997
Conference number: 5
|Conference||5th International Conference on Materials and Mechanisms of Superconductivity, High Temperature Superconductors|
|Period||28/02/1997 → 04/03/1997|