The present work investigates the polarization response in polycrystalline Ni0.9-yCuyZn0.1Fe1.98O4-δ(y = 0, 0.1, 0.2, 0.3, 0.4, 0.5) ferrite synthesized by solid-state reaction method. X-ray diffraction analysis confirmed cubic spinel phase formation in the calcined samples. Sintered samples contain a continuous network of CuO-rich segregation along the grain boundaries for y ≥ 0.2. Dielectric spectra showed a relaxation peak for y ≥ 0.2 in the frequency range of 1 kHz-1 MHz. This relaxation has been explained based on Maxwell-Wagner polarization considering two-layer model in connection with two heterogeneous dielectric media. © 2014, Elsevier B.V. All rights reserved.

Budaraju Srinivasa Murty

Department of Materials Science and Metallurgical Engineering

R.A. Mondal

V.R.K. Murthy

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Journal	Data powered by TypesetCurrent Applied Physics
Publisher	Data powered by TypesetElsevier
ISSN	15671739