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Liquid Phase Epitaxy (LPE) of YB 2 Cu 3 O 7‐δ High T c Superconductors
Author(s) -
Aichele T.,
Bornmann S.,
Dubs C.,
Görnert P.
Publication year - 1997
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170320817
Subject(s) - epitaxy , high temperature superconductivity , materials science , superconductivity , analytical chemistry (journal) , liquid phase , inorganic compound , phase (matter) , crystallography , chemistry , condensed matter physics , physics , nanotechnology , thermodynamics , layer (electronics) , organic chemistry , chromatography
YBa 2 Cu 3 O 7‐δ films were grown by liquid phase epitaxy in Y‐ZrO 2 crucibles on (110)NdGaO 3 substrates. A change in the preferred crystallographic growth direction was observed reproducibly. The growth mode changes from pure c ‐axis oriented over mixed c / a ‐axis oriented films to pure a ‐axis oriented films with increasing undercooling. X‐ray diffraction measurements and atomic force microscopy investigations with c ‐axis oriented as well as a ‐axis oriented films are presented. It will be shown that atomically smooth steps with 0.2‐0.8 μM width can be achieved by LPE, which are free from melt remnants. Furthermore the values for the enthalpy of dissolution from literature, which are varying in a wide range, will be combined and a new value will be calculated in terms of a multi particle model.