Dresden 2006 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 2: Superconductivity: Conductor Development

TT 2.2: Vortrag

Montag, 27. März 2006, 11:45–12:00, HSZ 02

Transport Properties of Grains and Low Angle Grain Boundaries in Y_1−xCa_xBa₂Cu₃O_7−δ — •Christof Schneider, Alexander Weber, Stefan Hembacher, Christian Schiller, Arno Kampf, Thilo Kopp, and Jochen Mannhart — Lehrstuhl für Experimentalphysik VI, Institut für Physik, Universität Augsburg, D-86135 Augsburg

One possibility to optimize for cable applications the critical current density of YBa₂Cu₃O_7−δ is to partially substitute Y³⁺ by Ca²⁺. To systematically investigate the effects of Ca-doping on the transport properties of low angle grain boundaries, we prepared a set of Y_1−xCa_xBa₂Cu₃O_7−δ (0≤ x ≤ 0.3) thin films on monocrystalline and bicrystalline SrTiO₃. Characteristic trends are revealed by the J_c(B,T)-dependencies. The dependencies are in part highly surprising as will be presented and discussed.

This work was supported by the DFG through the SFB 484, by the BMBF via project No. 13N6918A and by the THIOX project of the ESF.