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- W2019024315 abstract "Abstract A series of YBa 2 Cu 3 O 7− δ + x Cr 2 O 3 ( x =0.0, 2.3, 4.4, and 6.1 wt%) samples were prepared using solid state reaction method. Microstructural analysis reveal the reduced grain size with the incorporation of magnetic Cr 2 O 3 particles in the YBCO matrix. XRD graphs show the unchanged orthorhombic structure and improved oxygen ordering in the composite samples. With the increase of Cr 2 O 3 wt%, it is found that the superconducting transition temperatures determined from standard four-probe method decreases gradually. Excess conductivity fluctuation analysis using Aslamazov–Larkin model fitting reveals transition of two dominant regions (2D and 3D) above T c . 2D to 3D crossover temperature i.e. Lawerence–Doniach temperature that demarcates dimensional nature of fluctuation inside the grains is influenced by Cr 2 O 3 incorporation in YBCO matrix. The decrease in Lawerence–Doniach temperature in the mean field region has been observed as a consequent dominance of 3D region with increase in wt% of Cr 2 O 3 in the composite. The decrease in zero-resistance critical temperature and increase in transition width signifies the degradation of intergrain weak links." @default.
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- W2019024315 date "2013-07-01" @default.
- W2019024315 modified "2023-09-26" @default.
- W2019024315 title "SCOPF analysis of YBa2Cu3O7−+xCr2O3 superconductor composite" @default.
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- W2019024315 doi "https://doi.org/10.1016/j.jpcs.2013.02.011" @default.
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