Magnetization anomalies in the superconducting state of RuSr₂GdCu₂O₈ and the magnetic study of Sr₂GdRuO₆

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Papageorgiou, Thomas ; Herrmannsdörfer, Thomas ; Dinnebier, Robert E. ; Mai, Timo ; Ernst, Tobias ; Wunschel, Markus ; Braun, Hans F.:
Magnetization anomalies in the superconducting state of RuSr₂GdCu₂O₈ and the magnetic study of Sr₂GdRuO₆.
In: Physica C: Superconductivity and its Applications. Bd. 377 (2002) Heft 3 . - S. 383-392.
ISSN 0921-4534
DOI: https://doi.org/10.1016/S0921-4534(01)01291-6

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Abstract

d.c. magnetization measurements performed on a polycrystalline sample of RuSr2GdCu2O8 (Ru-1212) showed distinct peaks of the magnetization upon entering the superconducting state. Since Sr2GdRuO6 (Sr-2116) is the precursor for the preparation of Ru-1212, a detailed investigation of the magnetic properties of Sr-2116 was carried out. Although similarities were observed in the magnetic behavior of Sr-2116 and Ru-1212 in the temperature range of the observed peaks, we can exclude, based on a quantitative comparison, that the anomalies observed for Ru-1212 are due to Sr-2116 impurities.