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标题：Influence of DL-Alanine Fuel Concentration on Structural and Magnetic Properties of Nickel Ferrite Nanoparticles
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作者：Nandini Sharma ; Dr. Ranjana Jha
期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2015
卷号：4
期号：5
页码：3508
DOI：10.15680/IJIRSET.2015.0405103
出版社：S&S Publications
摘要：Nano sized NiFe2O4 has been prepared through Sol-gel auto combustion route by using DL-Alanine asfuel. The phase formation of NiFe2O4 is investigated by XRD and Raman techniques.In the case of higher fuel contenttwo molar (2M) in the mixture, it is noted that the as-prepared powders were highly crystalline, and exhibited thetypical XRD peaks corresponding to the formation of the NiFe2O4.According to the XRD spectra, the sample preparedwith 2M of fuel has better crystallinity than those prepared with one molar (1M) of fuel. Therefore, 2M of fuel ispreferable to prepare single phase NiFe2O4 nanoparticles with better crystallinity. Nickel ferrite powders (NFO) werefurther investigated using Raman spectroscopy in order to differentiate the NFO from other phases like Fe3O4 andgamma Fe2O3, which have the similar structures and therefore similar XRD patterns. The Raman spectra for all thesamples resemble to the inverse spinel structure of NiFe2O4. It is observed that sample NiFe2O4 powders that wereprepared with different molar concentration (1M and 2M) of the fuel DL-Alanine added to the solution mixture havedifferent magnetization. Sample added with 2M DL-Alanine fuel shows higher magnetization as compared to thesample added with 1M DL-Alanine fuel due to better crystallinity. The room temperature VSM studies show that thenano NiFe2O4 particles exhibit soft ferromagnetic nature with high saturation magnetization of 34.993 emu/g for 2 Mfuel amount.
关键词：Nanoparticles; Sol-gel auto combustion; Fuel (DL-Alanine); Crystallinity; Raman; inverse spinel.