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The XRD pattern of polycrystalline ceramics.
The temperature dependence of magnetization with ZFC and FC process at (a) 1 kOe and (b) 50 kOe, respectively.
Hysteresis loops of ceramics measured at 10 K after ZFC and FC process from 350 K in 50 kOe, inset shows the temperature dependence of .
The cooling field dependence of (a) exchange bias field , (b) coercivity , (c) vertical magnetization shift , and (d) saturated magnetization at 10 K; inset shows the dependence of on .
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