Details

Autor(en) / Beteiligte

• Huhtinen, H.
• Palonen, H.
• Malmivirta, M.
• Jha, R.
• Awana, V. P. S.
• Paturi, P.

Titel

Magnetically Defined B and B2} in \hbox-Doped \hbox\hbox\hbox Thin Films Grown Under Tensile and Compressive Strain

Ist Teil von

• IEEE transactions on applied superconductivity, 2015-06, Vol.25 (3), p.1-5

Ort / Verlag

IEEE

Erscheinungsjahr

2015

Quelle

IEEE Xplore

Beschreibungen/Notizen

• The effect of lattice mismatch between the film and the substrate on magnetically obtained irreversibility field B irr and upper critical field B c2 is investigated in BaCeO 3 (BCO)-doped YBa 2 Cu 3 O 6+x (YBCO) thin films prepared by pulsed laser deposition on SrTiO 3 (STO), SrLaAlO 4 (SLAO), MgO, and (67%)Pb(Mg 1/3 Nb 2/3 )O 3 -(33%)PbTiO 3 (PMN-PT) substrates. BCO has been observed to form epitaxially grown, nonelongated, and randomly distributed particles within the whole concentration range of 0-10 wt.%. Therefore, the optimal concentration of 4 wt.% BCO is selected, where the highest J c in the high applied magnetic field range can be observed. The observed flux pinning performance is connected to the structural properties of the films, where substrate-induced uniform strain; crystallographical defects such as dislocations, vacancies, and BCO-nanodot-induced microstrain; low-angle grain boundaries; and YBCO lattice ordering, in general, have substantially different roles at different crystallographical directions.