کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8155435 | 1524820 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and magnetic characterization of Zr-substituted magnetite (ZrxFe3âxO4, 0â¤xâ¤1)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Structural and magnetic characterization of Zr-substituted magnetite (ZrxFe3âxO4, 0â¤xâ¤1) Structural and magnetic characterization of Zr-substituted magnetite (ZrxFe3âxO4, 0â¤xâ¤1)](/preview/png/8155435.png)
چکیده انگلیسی
We report the preparation of monophasic Zr-substituted magnetite (ZrxFe3âxO4; 0â¤xâ¤1) nanoparticles by wet chemical route. Such a report is lacking in the literature. Rietveld refinement of the X-ray diffraction (XRD) data suggests continuous decrease in the lattice parameter with increased Zr-substitutions. From TEM analysis, the size of the as synthesized particles was found to be in the range of 5-20 nm. The differential scanning calorimetry (DSC) curves for the samples with different amount of substitutions displayed considerable differences in their behaviors. The room temperature specific magnetization at 2 T has been found to decrease from 50 (x=0.2) to 41 A m2/kg (x=1.0) with increased Zr-substitution. From XRD and magnetic behavior analysis we could suggest that due to occupation of Zr4+ ions at tetrahedral and octahedral voids of Fe3O4, the amount of Fe2+ was more at octahedral site for x⤠0.4 and at tetrahedral site for x>0.4 respectively. The ferrofluids prepared from these magnetic nanoparticles possessed good heating ability and Specific Absorption Rate (SAR) values suitable for bioapplications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 401, 1 March 2016, Pages 559-566
Journal: Journal of Magnetism and Magnetic Materials - Volume 401, 1 March 2016, Pages 559-566
نویسندگان
A. Gangwar, S.K. Alla, M. Srivastava, S.S. Meena, E.V. Prasadrao, R.K. Mandal, S.M. Yusuf, N.K. Prasad,