Determination of the optimal concentration of ions Zn2+ in the flex-free system Mn-Zn through the study of electrical and magnetic susceptibility characteristics

In order to study the practicability delimitating the optimal electrical properties have been studied for soft ferrite system Mn|.xZnxFe204, which prepared by solid state method in the temperature range 300 to 550 K by substituting Mn2+ ions instead of Zr,2+ ions. The resulting of this study shows that the electrical conductivity for these systems were optimal value (10"6 £T! cm. The calculation of activation energy gave of 0.25 eV and 0.33 eV, The positive sign of thermoelectric power (seeback coefficient) for these systems means that the majority carriers were holes,<br /> Also the optimal magnetic susceptibility properties resulted in values -132xlO"5 , -662x1 0'5. From the electrical properties (electrical conductivity and thermoelectric power ) and magnetic susceptibility, the optimal results when concentration ions for these systems is Fe2O4 , which means equaled 0.4 to Zn2+ ions and 0.6 <br /> الخلاصة