کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10656286 | 1005481 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of structural distortion on magnetic properties of CexY3âxFe5O12
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
This paper reports on preparation of the garnet compounds CexY3âxFe5O12 (x = 0.0, 0.1, 0.2, 0.3, 0.4, 0.5 and 0.6) by sol-gel method. The structural and magnetic properties were characterized by means of X-ray diffraction (XRD), scanning electron microscope (SEM), fourier transform infrared spectra (FTIR), alternative gradient field magnetometer (AGFM) and Mössbauer measurement. The XRD analysis indicated that all the samples have garnet structure. Also, the SEM images revealed that the particle sizes are in the range of 65 nm and has no noticeable effect by Ce3+ ion substitution. The a-d superexchange interactions is found to play an important role in the saturation magnetization of the sample. The variation of coercivity is governed by the change of anisotropy. The hyperfine parameters were discussed based on fitting the Mössbauer spectra with four sextets corresponding to distorted and undistorted tetrahedral and octahedral sites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 688, Part B, 15 December 2016, Pages 357-362
Journal: Journal of Alloys and Compounds - Volume 688, Part B, 15 December 2016, Pages 357-362
نویسندگان
M. Niyaifar, H. Mohammadpour, N. Khalafi,