Regensburg 2016 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 19: Superconductivity: Poster Session

TT 19.12: Poster

Montag, 7. März 2016, 15:00–18:00, Poster D

Overgrowth of cracks in YBa₂Cu₃O_6+δ-thin films grown on SrTiO₃- and Al₂O₃-substrates — •Kai Ackermann, Jens Hänisch, and Bernhard Holzapfel — Institut für Technische Physik, Karlsruher Institut für Technologie, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen

High temperature superconducting materials like REBCO-thin films offer a wide range of applications like superconducting transformers, cables, coils or fault current limiters. Although the number of applications is increasing the REBCO-coated conductor length is still limited due to substrate and thin film fabrication defects. In order to improve the manufacturing processes of REBCO-coated conductors the growth behavior of REBCO-thin films on defective or broken substrate surfaces has to be understood. Therefore we investigated the structural and electronic properties of YBCO-thin films grown on cracked SrTiO₃- and Al₂O₃-substrates. The YBCO-films were prepared by using metalorganic (MOD) and pulsed laser deposition (PLD). Structural and electronic properties of the YBCO-films were investigated by using x-ray diffractometry, atomic force microscopy, scanning electron microscopy and temperature- and magnetic field-dependent conductivity measurements.