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TT: Tiefe Temperaturen

TT 25: Postersitzung III: Pinning und Vortexdynamik, Massive HTSL, Bandleiter, Transporteigenschaften in HTSL, SL dünner Filme, Elektronen und Phononen in HTSL, Tunneln, Borkarbide, Quantenphasen und Metall-Isolator-Überg
änge, Anwendungen, Sonstiges

TT 25.9: Poster

Thursday, March 29, 2001, 14:30–17:00, Rang S\ 3

d.c. magnetization anomalies for RuSr₂GdCu₂O₈ can not be explained by Sr₂GdRuO₆ impurities — •Thomas P. Papageorgiou, Thomas Herrmannsdörfer, Timo Mai, Tobias Ernst, and Hans F. Braun — Physikalisches Institut, Universität Bayreuth, D-95440 Bayreuth

d.c. magnetization measurements performed on a polycrystalline sample of RuSr₂GdCu₂O₈ (Ru-1212) showed distinct peaks of the magnetization upon entering the superconducting state. Sr₂GdRuO₆ (Sr-2116) was used as a precursor for the preparation of the Ru-1212 sample. Therefore, a detailed investigation of the magnetic properties of Sr-2116 was done in order to investigate the possibility of explaining the anomalies observed for Ru-1212 in terms of Sr-2116 impurities in the sample. The results show that the peaks observed for Ru-1212 can not be due to Sr-2116 impurity phases.