Electric and Magnetic Properties of Ta-Doped Polycrystalline Mn-Zn Ferrite
نویسندگان
چکیده
Theeffect ofTa205additiveon the electric and magnetic properties of MnZn ferrites with fine grain size was studied Aadding small amounts ofTa205 to the MnZn ferriteincreased electric resistivity, while an excessive addition of Ta205causeddecreasein resistivity without significant grain growth. In asmall amount ofTa205 the change in the electric resistivity can be explained by ~ a ' ' substitution for ~ e ~ ' entailing disappearance of the oxygen defects. The excessive addition of Ta205 created the oxygen defects and the electrons which are promoted by the metallic ion defects and the thermal dissociation of oxygen.
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