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- W2016282941 abstract "In this paper, we study the doping effects of vanadium (V) in La1.85Sr0.15Cu1−xVxO4+δ and La2Cu1−xVxO4+δ systems. It is found that, in the La1.85Sr0.15Cu1−xVxO4+δ system, the maximum doping concentration of V for Cu is 0.15 and a tetragonal-to-orthorhombic phase transition occurs when x = 0.10. The doping of V leads to the decrease of the superconducting transition temperature, Tc. In the La2Cu1−xVxO4+δ system, the maximum doping concentration is 0.045 and the V-doped compounds have an orthorhombic structure. The lattice parameter c decreases and a increases lightly as x increases. No superconductivity is found in the as-prepared La2CuO4 compound without V doping. However, with the addition of V, La2Cu1−xVxO4+δ prepared under the same conditions shows superconductivity with Tc (onset) ~ 40 K. The average excess oxygen δ in La2Cu1−xVxO4+δ increases from 0.005 to 0.011 as x increases from 0.0 to 0.045. We propose that the occurrence of superconductivity in this system is attributed to the macroscopic phase separation induced by the addition of V4+." @default.
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- W2016282941 date "2003-11-19" @default.
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- W2016282941 title "The doping effect of vanadium in La1.85Sr0.15CuO4+ and La2Cu1 xVxO4+ systems" @default.
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- W2016282941 doi "https://doi.org/10.1088/0953-2048/17/1/004" @default.
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