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Studies on Structural and Electrical Properties of Ball-Milled NiCuZn-MgCuZn Nanocomposites Ferrites

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Abstract

Multilayer chip inductors (MLCIs) have been rapidly developed for electromagnetic applications. NiCuZn ferrites are the most preferred ferrite materials to produce MLCIs, and MgCuZn ferrites have similar electromagnetic properties to those of NiCuZn ferrites. In view of this, ferrite composites with ferromagnetic phase (X) Ni0.35Cu0.05 Zn0.6Fe2O4 + (1 – X) Mg0.25Cu0.25Zn0.5Fe2O4, in which X varies from 0.0 to 1.0, were prepared by the conventional ceramic double-sintering process. The sintered ferrite was characterized for direct current (DC) and alternating current (AC) electrical conductivities, and thermoelectric effect studies. The X-ray diffraction pattern confirms the formation of single-phase spinel structure; the grain size was estimated using an scanning electron micrograph (SEM). The electrical properties were studied as a function of temperature and composition. The temperature variations of these samples were carried out from 303 K to 523 K (30 °C to 250 °C) within the frequency range 100 Hz to 1 MHz. The sintered NiCuZn-MgCuZn ferrites prepared possess good electromagnetic properties and good structure, thus making them suitable materials for MLCIs due to its high resistivity.

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Acknowledgments

This work was financially supported by Defence Research and Development Organization (DRDO), under grant ERIP/ER/0103301/M/01, New Delhi, India. The authors are thankful to the authorities of Sri Krishnadevaraya University, Anantapur, India, for providing the facilities.

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Authors and Affiliations

  1. Department of Physics, Kakatiya University, Warangal, 506009, India

    N. Varalaxmi (Assistant Professor)

  2. Ceramic Composite Materials Laboratory, Department of Physics, Sri Krishnadevaraya University, S.V. Puram, Anantapur, 515 003, India

    N. Varalaxmi (Assistant Professor) & K. V. Sivakumar (Retired Professor)

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  1. N. Varalaxmi
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  2. K. V. Sivakumar
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Correspondence to N. Varalaxmi.

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Manuscript submitted October 25, 2012.

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Varalaxmi, N., Sivakumar, K.V. Studies on Structural and Electrical Properties of Ball-Milled NiCuZn-MgCuZn Nanocomposites Ferrites. Metall Mater Trans A 45, 1579–1585 (2014). https://doi.org/10.1007/s11661-013-2054-7

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