XRD pattern for a sample with nominal composition .
Temperature dependence of resistivity. The inset is resistivity near .
M-T curve under applied magnetic field for ZFC and FC. Inset is .
Right-hand temperature dependence of magnetization hysteresis loops (a) and curve at different temperatures (b).
Magneto-optical images on the polycrystalline sample. Top: image taken at external field of 8 Oe showing Meissner state after ZFC. Middle: imaging taken at 160 Oe showing flux penetration easily along intergranular path. Bottom: remanent state after field increased to 800 Oe and decreased to zero.
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