Gerhard Gritzner,
"Stabilising the Tl-1223 phase by doping with tellurium"
, in Christian Deinhofer and Gerhard Gritzner, in Superconductor Science and Technology, Vol. 16, Seite(n) 931 - 935, 2003, ISSN: 0953-2048, Stabilising the Tl-1223 phase by doping with tellurium
Christian Deinhofer and Gerhard Gritzner
Supercond. Sci. Techn., 16 (2003) 931 - 935
Original Titel:
Stabilising the Tl-1223 phase by doping with tellurium
Sprache des Titels:
Englisch
Original Kurzfassung:
Te-doping of (Tl0.54Pb0.5-xTex)(Sr0.85Ba0.15)2Ca2Cu3Oy superconductors with x ranging from 0 to 0.1 has been investigated. Small amounts of Te (x < 0.05) strongly favoured the formation of the Tl-1223 phase in bulk samples, leading to phase-pure material. The concentration of the Tl-1212 phase was below the detection limit of the X-ray diffraction. The critical temperatures of bulk phase Tl-1223 for x = 0.02 were 120 K. The transition widths narrowed and the critical current densities for bulk phase material increased upon addition of small amounts of Te. At higher doping levels Ba2CuTeO6 appeared as a secondary phase but the remaining material was still high-purity Tl-1223 phase. (Tl0.54Pb0.48Te0.02)(Sr0.85Ba0.15)2Ca2Cu3Oy films on lanthanum aluminate substrates prepared by screen-printing of the precursor and followed by ex situ thallination, lead to highly c-axis oriented and ab aligned samples with critical temperatures Tc(0) of 117 K and transition widths ΔT(90-10%) of 1 K. Critical current densities of 1.15 x 1010 A m-2 were achieved for 1.5 µm thick films in self field at 77 K. The critical current densities at 0.8 T and 77 K were 7.4 x 109 A m 2 for H || ab and 0.7 x 10-9 A m 2 for H || c.
Sprache der Kurzfassung:
Englisch
Englische Kurzfassung:
Te-doping of (Tl0.54Pb0.5-xTex)(Sr0.85Ba0.15)2Ca2Cu3Oy superconductors with x ranging from 0 to 0.1 has been investigated. Small amounts of Te (x < 0.05) strongly favoured the formation of the Tl-1223 phase in bulk samples, leading to phase-pure material. The concentration of the Tl-1212 phase was below the detection limit of the X-ray diffraction. The critical temperatures of bulk phase Tl-1223 for x = 0.02 were 120 K. The transition widths narrowed and the critical current densities for bulk phase material increased upon addition of small amounts of Te. At higher doping levels Ba2CuTeO6 appeared as a secondary phase but the remaining material was still high-purity Tl-1223 phase. (Tl0.54Pb0.48Te0.02)(Sr0.85Ba0.15)2Ca2Cu3Oy films on lanthanum aluminate substrates prepared by screen-printing of the precursor and followed by ex situ thallination, lead to highly c-axis oriented and ab aligned samples with critical temperatures Tc(0) of 117 K and transition widths ΔT(90-10%) of 1 K. Critical current densities of 1.15 x 1010 A m-2 were achieved for 1.5 µm thick films in self field at 77 K. The critical current densities at 0.8 T and 77 K were 7.4 x 109 A m 2 for H || ab and 0.7 x 10-9 A m 2 for H || c.
Journal:
Superconductor Science and Technology
Volume:
16
Seitenreferenz:
931 - 935
Erscheinungsjahr:
2003
Notiz zum Zitat:
Stabilising the Tl-1223 phase by doping with tellurium
Christian Deinhofer and Gerhard Gritzner
Supercond. Sci. Techn., 16 (2003) 931 - 935
ISSN:
0953-2048
Anzahl der Seiten:
5
Notiz zur Publikation:
Stabilising the Tl-1223 phase by doping with tellurium
Christian Deinhofer and Gerhard Gritzner
Supercond. Sci. Techn., 16 (2003) 931 - 935
Forschungs-