LIQUID-PHASE EPITAXY (LPE) OF YB2CU3O7-DELTA HIGH T-C SUPERCONDUCTORS

YBa2Cu3O7-delta films were grown by liquid phase epitaxy in Y-ZrO2 cru cibles on (110)NdGaO3 substrates. A change in the preferred crystallog raphic growth direction was observed reproducibly. The growth mode cha nges from pure c-axis oriented over mixed c/a-axis oriented films to p ure a-axis oriented films with increasing undercooling. X-ray diffract ion measurements and atomic force microscopy investigations with c-axi s oriented as well as a-axis oriented films are presented. It will be shown that atomically smooth steps with 0.2-0.8 mu m width can be achi eved 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.