Electrical, Structural, Magnetic and Transport Properties of Zn2 Ba Fe16 O27 Doped With Cu2+
D. M. Hemeda and O. M. Hemeda
DOI : 10.3844/ajassp.2008.289.295
American Journal of Applied Sciences
Volume 5, Issue 4
Series of polycrystalline samples of Zn2-x Cux Ba Fe16 O27 were prepared by usual ceramic methods, where (x=0.0, 0.4, 0.6, 0.8, 1.0, 1.4) . X-ray analysis were obtained at room temperature using Coka with Î» = 1.790A0 confirmed the presence of W-type hexaferrite phase structure . Saturation magnetization and hysteresis loops curves measurements at room temperature were studied as a function of Cu 2+ substitution . It can be seen that the Cu 2+ content slightly decreases the saturation magnetization from 25 to 20 (emug-1), all hysterysis loops are closed which indicates low anisotropy field and low saturation magnetization field . The dc conductivity and thermoelectric power was measured in range from room temperature up to T = 750 K for all samples . The thermoelectric power decreases by increasing Cu 2+ content and the conductivity increases with temperature . The value of the charge carrier concentration increases by increasing temperature and Cu 2+ content.
© 2008 D. M. Hemeda and O. M. Hemeda. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.