Stabilization of orthorhombic Ba2YCu3O7-delta phase by the 5a group transition metal elements, (CROSBI ID 94843)
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Brničević, Nevenka ; Tušek-Božić, Ljerka ; Planinić, Pavica ; Popović, Stanko ; Rakvin, Boris ; Požek, Miroslav ; Dulčić, Antonije ; Leising, G. ; Aichholzer, K. D. ; Schweiger, E. ; Wippel, V.
engleski
Stabilization of orthorhombic Ba2YCu3O7-delta phase by the 5a group transition metal elements,
The effect of partial replacement of copper atoms in the superconducting orthorombic Ba2YCu3O7-delta phase with the 5a group transition metal elements has been studied. It was shown that in the Ba2YCu3-xMxO7-delta (M=V, Nb or Ta) system, the orthorombic phase is stabilized in a wide range of dopant concentrations. A degradation of superconducting properties takes places gradually by increasing the dopant level, this being accompanied by formation of the other phases, i.e. BaVO3, BaV2O8, Ba2YNbO6, Ba2YTaO6 and CuO. X-ray powder diffraction, electron paramagnetic resonance spectroscopy, low field non-resonant microwave absorption, electrical resistance and magnetic susceptibility measurements were correlated.
perovskite phase superconductors; synthesis
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