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M-type barium ferrites Ba(CoTi)1.20Fe9.6O19 were synthesized with 5.0wt% Bi2O3 additive at low temperatures in an oxygen atmosphere. For temperatures increasing from 900°C to 945°C, the saturation magnetization (Ms) increased first and then decreased. However, coercivity (Hc) decreased first and then increased. Superfluous Bi2O3 produced BiFeO3 dielectric phase with Fe3+ ions. When the samples were...
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