TY - JOUR T1 - Magnetic, dielectric and complex impedance spectroscopic studies of nanocrystalline Cr substituted Li-ferrite JF - Journal of Magnetism and Magnetic Materials Y1 - 2010 A1 - Hankare, P. P. A1 - Patil, R. P. A1 - Sankpal, U. B. A1 - Garadkar, K. M. A1 - Sasikala, R. A1 - Tripathi, A. K. A1 - Mulla, Imtiaz S. KW - Complex impedance KW - dielectric response KW - Ferrites KW - Magnetic hysteresis KW - Sol-gel synthesis KW - X-ray diffraction AB -

Nanocrystalline Li0.5Fe2.5-xCrxO4 (2.5 <= x >= 0) ferrites were prepared by a sol-gel autocombustion route. X-ray diffraction was employed to confirm the cubic spinel phase formation of the ferrites. The lattice parameter decreases with increase in Cr content. The saturation magnetization, coercivity and remanance were studied as a function of Cr content. The dielectric constant and dielectric loss were measured as a function of frequency in the frequency range 20 Hz-1 MHz. Frequency dependence of dielectric constant shows dielectric dispersion due to the Maxwell-Wagner type of interfacial polarization. In order to understand the conduction mechanism, complex impedance measurements were carried out. The substitution of chromium plays an important role in changing the dielectric and magnetic properties of lithium ferrites. (C) 2010 Published by Elsevier B.V.

PB - ELSEVIER SCIENCE BV CY - PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS VL - 322 IS - 18 U3 - Foreign U4 - 1.689 ER -