Title: Synthesisation, electrical and magnetic properties of Al doped nano ferrite particles

Authors: Khalid Mujasam Batoo, Alimuddin, Shalendra Kumar

Addresses: Department of Applied Physics, Aligarh Muslim University, Aligarh-2020 02, UP, India. ' Department of Applied Physics, Aligarh Muslim University, Aligarh-2020 02, UP, India. ' School of Nano and Advanced Materials Engineering, Changwon National University, #9 Sarim dong, Changwon-641773, Korea

Abstract: Single phase cubic spinel nanocrytalline particles of Al doped Ni0.2Cd0.3Fe2.5O4 has been synthesised by sol-gel method with an average crystallite size of ∼5 nm. The dielectric constant (ε′) and ac conductivity (σac) shows normal behaviour with frequency. The dielectric properties and ac conductivity in the samples have been explained in the light of Koops phenomenological theory. The impedance analysis shows that grain boundary volume increases with Al doping. ac susceptibility measurements show that the blocking temperature decreases with the Al doping. The variation of blocking temperature in the real and imaginary part of ac susceptibility shows the existence of non-linear phase.

Keywords: ferrite nanotechnology; dielectric constant; AC conductivity; impedance spectroscopy; AC susceptibility; nanoferrite particles; nanoparticles; sol-gel; aluminium doping.

DOI: 10.1504/IJNP.2009.028776

International Journal of Nanoparticles, 2009 Vol.2 No.1/2/3/4/5/6, pp.416-422

Published online: 30 Sep 2009 *

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