کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9834589 | 1524912 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic properties of superparamagnetic γ-Fe2O3 nanoparticles prepared by coprecipitation technique
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
γ-Fe2O3 nanoparticles have been synthesized by a chemical coprecipitation technique using the typical pipette drop method and the novel piezoelectric nozzle method. Nanoparticles made by the piezoelectric nozzle method show smaller size and very narrow size distribution compared to the nanoparticles produced by the pipette drop method. The superconducting quantum interference device (SQUID) measurements show superparamagnetism of nanoparticles and reveal that the anisotropy constants of the nanoparticles made by the pipette drop method and the piezoelectric nozzle method are 2.2Ã106 and 9.0Ã106 erg/cm3, respectively. By measuring the magnetic relaxation of the magnetization at 5 K, we also obtained magnetic viscosity of γ-Fe2O3 nanoparticles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 286, February 2005, Pages 5-9
Journal: Journal of Magnetism and Magnetic Materials - Volume 286, February 2005, Pages 5-9
نویسندگان
Jong-Ryul Jeong, Sung-Chul Shin, Seung-Jun Lee, Jong-Duk Kim,