Singh, Sukhdeep and Singh, Manpreet and Kotnala, R. K. and Verma, Kuldeep Chand (2014) Hydrothermal synthesis of NiFe2O4, Ni0.6Zn0.4Fe2O4 and Ni0.6Zn0.4Fe2O4/SrFe2O4: nanostructure, magnetic and dielectric properties. Indian Journal of Pure and Applied Physics, 52 (8). pp. 550-555. ISSN 0019-5596

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NiFe2O4 (NF), Ni0.6Zn0.4Fe2O4 (NZF) and Ni0.6Zn0.4Fe2O4/SrFe2O4 (NZF/SF) nanostructures were prepared by hydrothermal synthesis at 180 degrees C/48 h. The synthesis of NF shows nanoparticles of average size 19 nm. However, NZF and NZF/SF show nanowires of average diameter similar to 23 and 6 nm, and length 325 and 160 nm, respectively. A growth mechanism for fabrication of nanostructure is given. The X-ray diffraction pattern confirms the polycrystalline structure of spinel phase of NF and NZF and orthorhombic phase of SF ferrite. The microstructural analysis is confirmed by transmission electron microscopy. The ferromagnetic behaviour of each ferrite sample is confirmed by M-H hysteresis. However, the M-H hysteresis of composite NZF/SF also shows spring like vibrations which indicate a strong coupling between hard and soft phases. The higher value of remanent magnetization is observed in NZF/SF which is possible by combining soft/hard ferrite phase. The effect of low dimensions of NZF/SF nanostructure is to control dielectric constant with low loss up to higher frequency of 120 MHz, has been observed.

Item Type: Article
Uncontrolled Keywords: Ferrite, Nanostructures, Hydrothermal synthesis, Magnetism, Dielectric properties
Subjects: Physics
Depositing User: Dr. Rajpal Walke
Date Deposited: 13 Oct 2015 09:56
Last Modified: 13 Oct 2015 09:56

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