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首页> 外文期刊>Physica, B. Condensed Matter >The effect of highly activated hopping process on the physical properties of Co-Zn-La ferrite
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The effect of highly activated hopping process on the physical properties of Co-Zn-La ferrite

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Samples of Co1-xZnxLayFe2-yO4, 0.1 <= x <= 0.9, y=0.25, were prepared using standard ceramic technique. X-ray investigations were carried out in order to assure the formation of the samples in single spinel phase. The dielectric constant epsilon' was measured at different temperatures as the function of frequencies ranging from 100 kHz to 3 MHz for the investigated samples. The dielectric constant epsilon' increases with temperature up to transition temperature T(epsilon') and decreases with frequency. epsilon' decreases also with increasing Zn content. T epsilon' increases continuously with Zn content depending on frequency. The magnetic susceptibility for the prepared samples was measured using Faraday's method at different temperatures as the function of the magnetic field intensity. The magnetic parameters were calculated from the magnetic susceptibility data, in the temperature range 300-800 K at three different magnetic field intensities of 720, 1070 and 1380 Oe. The data show a decrease in the magnetic susceptibility till it reaches the Curie temperature T-C. It is noted that the effective magnetic moment (mu(eff.)) gives the same trend as that of T-C with Zn content.

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