This title appears in the Scientific Report :
2001
Please use the identifier:
http://dx.doi.org/10.1109/77.919884 in citations.
Please use the identifier: http://hdl.handle.net/2128/1073 in citations.
Properties of YBa2Cu3O7 thin films deposited on substrates and bicrystals with vicinal offcut and realization of high IcRn Junctions
Properties of YBa2Cu3O7 thin films deposited on substrates and bicrystals with vicinal offcut and realization of high IcRn Junctions
The surface morphology, microstructure and transport properties of epitaxial YBa2Cu3O7 and PrBa2Cu3O7 thin films and heterostructures deposited on slightly vicinal substrates of SrTiO3 by high pressure oxygen sputtering were studied. The vicinal angles of the substrates and bicrystals were less then...
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Personal Name(s): | Poppe, T. D. |
---|---|
Divin, Y. Y. / Faley, M. M. / Wu, J. S. / Jia, C. L. / Shadrin, P. / Urban, K. | |
Contributing Institute: |
Mikrostrukturforschung; IFF-IMF |
Published in: | IEEE transactions on applied superconductivity, 11 (2001) S. 3768 - 3771 |
Imprint: |
New York, NY
IEEE
2001
|
Physical Description: |
3768 - 3771 |
DOI: |
10.1109/77.919884 |
Document Type: |
Journal Article |
Research Program: |
Festkörperforschung für die Informationstechnik |
Series Title: |
IEEE Transactions on Applied Superconductivity
11 |
Subject (ZB): | |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/1073 in citations.
The surface morphology, microstructure and transport properties of epitaxial YBa2Cu3O7 and PrBa2Cu3O7 thin films and heterostructures deposited on slightly vicinal substrates of SrTiO3 by high pressure oxygen sputtering were studied. The vicinal angles of the substrates and bicrystals were less then 13 degrees. Depending on the tilt angle of the substrate a transition from spiral or island to step-flow growth leading to an improvement of the surface roughness was observed. Atomic force and transmission electron microscopy were used for these investigations. Furthermore, electrical and structural properties of YBa2Cu3O7 thin films on vicinal offcut SrTiO3 bicrystals with different grain boundary types were studied. This included junctions with a 2x 12 degrees tilt or twist of the YBa2Cu3O7 c-axis across the grain boundary. In comparison to conventional [001]-tilt grain boundaries bicrystal Josephson junctions [100]-tilt grain boundaries showed high I-c R-n -products of up to 1.2 meV at 77 K and up to 8 meV at 4.2 K. IV-curve instabilities, probably of magnetic origin due to flux flow in the electrodes, often could he observed for junctions biased with high current densities. |