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XRD patterns of doped bulk with Co contents of 0.5%, 1%, 2%, and 6%.
XPS studies of Co and peaks for the 2% Co doped .
Room-temperature magnetization vs magnetic field curves for with different Co contents. Bottom-right inset: the enlarge curve of 0.1% and 0.5% Co doped . Top-left inset: magnetization vs temperature curves collected at for 2% Co doped .
The evolution of saturation magnetization with increasing Co content for Co: . The lines are fitting to the experimental data.
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