XRD patterns of pure, monodoped, and codoped samples. The inset shows an expanded view of the (002) and (110) peaks of all samples.
(a) Variations of FWHM of (100), (101), (002), and (110) peaks of pure and doped samples, and (b) Williamson–Hall plots of the planes for all samples and the dashed lines represent the linear fits to the data points.
[(a)–(e)] SEM images of the fractured surfaces of pure and doped samples and (f) TEM image of a typical sample SH52.
dc magnetic susceptibility vs temperature plots in zero-field cooled condition at 100 Oe for all samples.
curves at 5 K of pure, monodoped, and codoped samples.
Structural and superconducting properties of pure, monodoped, and codoped .
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