DocumentCode :
49611
Title :
Author :
Sieger, Max ; Hanisch, Jens ; Pahlke, Patrick ; Sparing, Maria ; Gaitzsch, Uwe ; Iida, Kazumasa ; Nast, Rainer ; Reich, Elke ; Schultz, Ludwig ; Holzapfel, Bernhard ; Huhne, Ruben
Author_Institution :
Leibniz Inst. for Solid State & Mater. Res. (IFW), Dresden, Germany
Volume :
25
Issue :
3
fYear :
2015
fDate :
Jun-15
Firstpage :
1
Lastpage :
4
Abstract :
YBa2Cu3O7-δ (YBCO) films with a thickness of up to 2 μm containing nano-sized BaHfO3 (BHO) have been grown on biaxially textured metal tapes by pulsed laser deposition. Transmission electron microscopy revealed the inclusion of Y2O3 platelets and rod-like BHO structures. A c-axis oriented growth of the YBCO layer and biaxial oriented incorporation of BHO is confirmed by X-Ray diffraction. BHO expands the c-axis of YBCO, flattens the surface of YBCO and densifies the films. Y2O3 inclusions get smaller and finer distributed, possibly with a positive influence on pinning effects. A superconducting transition temperature Tc of about 89 K was determined, decreasing slightly with increasing BHO content. Transport current measurements in the maximum Lorentz force configuration showed an increased irreversibility field Hirr and higher pinning force density Fp with increasing BHO content in high magnetic fields.
Keywords :
X-ray diffraction; barium compounds; densification; electrical conductivity; flux pinning; high-temperature superconductors; nickel alloys; pulsed laser deposition; superconducting tapes; superconducting thin films; superconducting transition temperature; transmission electron microscopy; tungsten alloys; yttrium compounds; Lorentz force configuration; NiW; X-ray diffraction; YBCO:BaHfO3; biaxially textured metal tapes; c-axis oriented growth; densification; highly alloyed textured tapes; inclusions; irreversibility field; magnetic field; pinning force density; platelet structures; pulsed laser deposition; rod-like structures; superconducting transition temperature; thick YBCO films; transmission electron microscopy; transport current measurements; Art; Films; Lattices; Magnetic fields; Substrates; Superconducting films; Yttrium barium copper oxide; BHO; RABiTS; YBCO; pinning; pulsed laser deposition;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2014.2372903
Filename :
6963345
Link To Document :
