Optical and magnetic properties of ZnO/ZnFe2O4 nanocomposite
authors Zamiri, R; Salehizadeh, SA; Ahangar, HA; Shabani, M; Rebelo, A; Kumar, JS; Soares, MJ; Valente, MA; Ferreira, JMF
nationality International
journal MATERIALS CHEMISTRY AND PHYSICS
author keywords Optical properties; Magnetic properties; ZnO; Photoluminescence nanocomposite; XRD
keywords ENHANCED PHOTOCATALYTIC ACTIVITY; LIGHT IRRADIATION; NANOPARTICLES; DEGRADATION; GAMMA-FE2O3; NANOSTRUCTURES; NANOCRYSTALS; MORPHOLOGY; PARTICLE
abstract ZnO/ZnFe2O4 nanocomposite was prepared by a simple and low cost chemical precipitation method. The prepared composite was characterized by X-ray diffraction (XRD), energy -dispersive X-ray (EDX), Raman and Fourier Transform infrared spectroscopy (FTIR). The morphology of the prepared sample was studied by scanning electron microscopy (SEM). Photoluminescence (PL) emission of the sample has been investigated at different temperatures (10-300 K) in order to determine the effect of temperature on emission properties of the prepared composite. It was found that at low temperature, the samples show stronger emissions than those at room temperature. Magnetic properties of ZnO/ZnFe2O4 nanocomposite was discussed in temperature range of 5-300 IC using VSM measurement. The effective anisotropy constant K-eff, extracted from the magnetization vs. magnetic field, M(B), experimental curve obtained at 5 K and using the law of saturation magnetization, was found to be 2.3 x 10(6) erg/cm(3). The high value of anisotropy constant is attributed to the existence of uncompensated surface spin in our sample as well as the magnetocrystalline contribution (which depends on the inversion degree in ZnFe2O4). By using of a modified Langevin equation, the contribution of the surface spins was quantitatively calculated in different temperature higher than TB. It was found that as the temperature increases from 100 K to 300 K, the surface spins contribution in the total magnetization increases from 44% to 68%.(C) 2017 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0254-0584
year published 2017
volume 192
beginning page 330
ending page 338
digital object identifier (doi) 10.1016/j.matchemphys.2017.01.066
web of science category Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000397685900042
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journal analysis (jcr 2017):
journal impact factor 2.210
5 year journal impact factor 2.296
category normalized journal impact factor percentile 55.614
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