2005/04/25 by R. Escamilla, F. Morales, T. Akachi +2
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-2048/18/6/002
published as Published in: Supercond. Sci. Technol. 18 (2005) 798-804 · 9 pages, 7 figures
openalex publication_date 2005/04/25 · arxiv created 2005/06/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
Samples from the Ru 1− x Fe x Sr 2 GdCu 2 O 8 system with x = 0, 0.025, 0.05, 0.075, 0.1 and 0.2, were prepared and their structural, superconducting and magnetic properties were studied. Rietveld refinement of the x-ray diffraction patterns shows that the Fe substitution occurs at both Ru and Cu sites. An increase of Fe concentration produces no significant changes in the Ru–O(3)–Ru bond angle, which is a measure of the rotation of the RuO 6 octahedra around the c -axis, or in the Cu–O(1)–Ru bond angle ϕ, which is a measure of the canting of the RuO 6 octahedra. On the other hand, the Cu–O(2)–Cu bond angle, which is a measure of the buckling of the CuO 2 layer, has a slight tendency to decrease with increase of the Fe content. We found that both ferromagnetic and superconducting transition temperatures are reduced with increase of the Fe concentration. Analysis related to the decay of the superconducting and ferromagnetic states is presented.