کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1803770 | 1024629 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Hydrothermal-induced oriented growth of Fe–Co alloy and Sm3+-substituted magnetite nanowire composites Hydrothermal-induced oriented growth of Fe–Co alloy and Sm3+-substituted magnetite nanowire composites](/preview/png/1803770.png)
Fe–Co alloy and Sm3+-substituted magnetite nanowire composites (CoxFe1−x/CoyFe1−ySmzFe2−zO4) have been synthesized via a hydrothermal method without using surfactants or templates. The effects of substitution on structure and morphology were investigated by powder X-ray diffraction, X-ray photoelectron spectroscopy, Mössbauer spectroscopy, and transmission electron microscopy (TEM). The TEM image shows that the average diameter of the magnetite nanowires is about 40 nm and the length is several micrometers. The z=0.1 composite shows relatively high saturation magnetization (92.3 emu/g) detected by a vibrating sample magnetometer. The possible growth mechanism of the nanowires is discussed on the basis of the crystal structure of the materials. From the perspective of thermodynamics, we explain the postulated mechanism of the hydrothermal reaction.
Journal: Journal of Magnetism and Magnetic Materials - Volume 320, Issue 23, December 2008, Pages 3297–3302