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Structural and magnetic properties of nanometric Zn-ferrite prepared by different methods

K. BENKHOUJA1, EL MOKHTAR LEMDEK1, K. JAAFARI1, M. BETTACH2, M. TOUAIHER1, K. SBIAAI3, Y. BOUGHALEB3,4, S. TOUHTOUH5,6, A. HAJJAJI6, REGINO-SAEZ-PUCHE7

Affiliation

  1. EMNED, Chemistry Department, Faculty of Sciences, UCD University, P.O. Box 20/24000, El Jadida, Morocco
  2. LPCM, Chemistry Department, Faculty of Sciences, UCD University, El Jadida, Morocco
  3. LPMC,Physics Department, Faculty of Sciences, UCD University, El Jadida, Morocco
  4. Hassan II Academy of Sciences and Technology, Rabat, Morocco
  5. LMCPA, UVHC, F-59600 Maubeuge, France
  6. ENSA, National School of Applied Sciences, UCD , P.O. Box 1166Plateau 24002, El Jadida, Morocco
  7. Departamento de Química Inorgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040 Madrid, Spain

Abstract

This work has the objective of studying the influence of preparation methods on the structural, morphology and magnetic properties of ZnFe2O4 ferrites. The samples were prepared by various methods of synthesis (conventional ceramic method, sol-gel, freeze-drying and hydrothermal method), and were characterized by X-ray diffraction (XRD), (SEM) and (TEM) micrographs and magnetization measurements. The characteristics of ZnFe2O4 sample prepared by different methods have been studied to select the better method, i.e. the one that is the simplest and does not require an elaborate instrumental set-up. The results indicated that the hydrothermal method gives the lowest value for the lattice parameter (8.4261Å) and small nanosizes of particles (14 nm), while the highest values (a=8.4394Å and d=158.5 nm) are obtained with the ceramic method. The DC magnetization (2-300 K) measurements reveal a superparamagnetic behaviour for this sample prepared by hydrothermal method with a blocking temperature (TB=12K). In the case the ceramic method TB equal to 20K. Over the TB all the samples ZnFe2O4 show a paramagnetic behavior..

Keywords

Nanometric Zn- ferrite, Spinel ferrites, Blocking temperature TB, Superparamagnetism.

Submitted at: April 17, 2013
Accepted at: June 12, 2013

Citation

K. BENKHOUJA, EL MOKHTAR LEMDEK, K. JAAFARI, M. BETTACH, M. TOUAIHER, K. SBIAAI, Y. BOUGHALEB, S. TOUHTOUH, A. HAJJAJI, REGINO-SAEZ-PUCHE, Structural and magnetic properties of nanometric Zn-ferrite prepared by different methods, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 5-6, pp. 410-416 (2013)