کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1340140 | 979722 | 2009 | 4 صفحه PDF | دانلود رایگان |
Nanocrystalline nickel ferrite (NiFe2O4) powder was prepared by a co-precipitation method from Ni and Fe chlorides. The as-prepared samples were characterized by powder X-ray diffractometry (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and vibrating sample magnetometry (VSM). SEM and TEM indicated that the particles were spherical with particle sizes in the range 25 ± 5 nm. The magnetic properties of the sample were measured by using a vibrating sample magnetometer, which showed that the sample exhibited typical ferromagnetic behavior at room temperature, while a finite coercivity of 245.5 Oe was present at 300 K. The saturation magnetization of the sample (23.13 emu/g) was significantly lower than that for the reported multidomain bulk particles (55 emu/g), reflecting the ultrafine nature of the sample.
Nanocrystalline nickel ferrite (NiFe2O4) powder was prepared by a co-precipitation method from Ni and Fe chlorides. The as-prepared nickel ferrite nanocrystals were characterized by XRD, SEM, TEM, and FTIR. SEM and TEM indicated that the particles were spherical with particle sizes in the range 25 ± 5 nm. The magnetic properties of the sample were measured by using a vibration sample magnetometer, which showed that the sample exhibited typical ferromagnetic behavior at room temperature, while a finite coercivity of 245.5 Oe was present at 300 K.Figure optionsDownload as PowerPoint slide
Journal: Polyhedron - Volume 28, Issue 8, 10 June 2009, Pages 1455–1458