caa a22 4500 388019999 CHVBK 20180307124921.0 cr unu---uuuuu 161130e199804 xx s 000 0 eng 10.1557/JMR.1998.0132 doi S0884291400043697 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0132 Tetragonal-orthorhombic phase transition in YBaCuO thin films observed by perturbed angular correlation spectroscopy [Elektronische Daten] Oxygen-deficient, tetragonal thin films of YBa2Cu3O6+x with x ≈ 0.25, quenched from the deposition temperature, change to the oxygenated, orthorhombic phase with x ≈ 1, between 200 °C and 400 °C in flowing oxygen. The transition is not reversible in flowing oxygen, and cannot be completely reversed by cooling in flowing argon. We do not observe a transition of the orthorhombic films to the tetragonal phase up to 800 °C in flowing oxygen. We observe that the major impurity phases to appear under nonoptimal annealing conditions are oriented phases of YcuO2 and BaCu2O2, with Y2BaCu2O5 and Y2Cu2O5 conspicuously absent. These conclusions have been drawn from a study that uses perturbed angular correlation spectroscopy to probe the local microstructure of the films. Copyright © Materials Research Society 1998 Platzer R. Department of Physics and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331-6507 Dumkow I. D. Department of Physics and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331-6507 Tom D. W. Department of Physics and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331-6507 Gardner J. A. Department of Physics and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331-6507 Tate J. Department of Physics and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331-6507 Journal of Materials Research Cambridge University Press 13/4(1998-04), 947-953 0884-2914 13:4<947 1998 13 JMR https://doi.org/10.1557/JMR.1998.0132 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0132 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Platzer R. Department of Physics and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331-6507 NATIONALLICENCE 700 1- Dumkow I. D. Department of Physics and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331-6507 NATIONALLICENCE 700 1- Tom D. W. Department of Physics and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331-6507 NATIONALLICENCE 700 1- Gardner J. A. Department of Physics and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331-6507 NATIONALLICENCE 700 1- Tate J. Department of Physics and Center for Advanced Materials Research, Oregon State University, Corvallis, Oregon 97331-6507 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/4(1998-04), 947-953 0884-2914 13:4<947 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge