Details

Autor(en) / Beteiligte

• Schäfer, Helmut
• Banko, Franziska
• Nordmann, Jörg
• Voss, Benjamin
• Steinhart, Martin
• Walder, Lorenz
• Rathmann, Dirk

Titel

Oxygen Plasma Effects on Zero Resistance Behavior of Yb,Er-doped YBCO (123) Based Superconductors

Ist Teil von

• Zeitschrift für anorganische und allgemeine Chemie (1950), 2014-08, Vol.640 (10), p.1900-1906

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Rare‐earth doped YBa2Cu3O7–δ samples were synthesized starting from the corresponding oxides Y2O3, Yb2O3, Er2O3, CuO as well as Ba(OH)2 by heating to 950 °C under air. The doping concentrations were adjusted to 15 % Yb, 7 % Er and 20 % Yb, 15 % Er, respectively, with respect to the yttrium content. The orthogonal phased (123) YBCO ceramics were exposed to an oxygen plasma for 140 and 380 min. Zero resistance temperature (Tc,0) was determined by measuring the resistivity‐temperature dependence using a classical four point measurement approach. Under optimal conditions with respect to the material composition and the oxygen treatment an unusual high zero resistance temperature of 97.5 K (Tc,onset ≈ 101 K) was achieved. This represents an increase of Tc,0 by 7.5 K. The oxygen treatment could not be monitored by IR spectroscopy, X‐ray fluorescence spectroscopy, and X‐ray powder diffraction. The results showed good reproducibility.