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
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Magnetic properties of superparamagnetic γ-Fe2O3 nanoparticles prepared by coprecipitation technique
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 2.2×106 and 9.0×106 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
نویسندگان
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