Open AccessStructural, magnetic and electrical properties of nano NiCrxFe2-xO4synthesized by flash auto combustion method
Author(s) -
A.M.A. Henaish,
O. M. Hemeda,
B. I. Salem,
F. S. El-Sbakhy,
Talal Khalass
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1253/1/012025
Subject(s) - spinel , materials science , ferrite (magnet) , electrical resistivity and conductivity , analytical chemistry (journal) , curie temperature , coercivity , nichrome , dielectric , atmospheric temperature range , magnetization , metallurgy , nuclear magnetic resonance , condensed matter physics , chemistry , ferromagnetism , composite material , magnetic field , optoelectronics , electrical engineering , physics , chromatography , quantum mechanics , meteorology , engineering
The spinel Nano-ferrite system NiCr x Fe 2-x O 4 (where x=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0) have been prepared using flash auto combustion method. The XRD pattern confirms the formation of spinel Ni-Cr ferrite for the as-prepared samples. Electrical properties of as- prepared samples such dielectric constant and AC resistivity were studied in the temperature range (288- 773 K). It was observed that the AC resistivity increases by increasing Cr content and decreases by increasing frequency. The DC electrical resistivity was found to increase by increasing Cr content from 25*10 6 to 136*10 6 Ω.cm, whereas it was found to decrease with increasing temperature. VSM was used to study the magnetic properties of Ni-Cr ferrite at room temperature. It was found that, with increasing Cr content the (Ms) saturation magnetization decreased from 28 to 3 emu/g whereas coercivity increased from 188 to 666 (G).The magnetic moment of the system and Curie temperature decreased by increasing Cr substitution.