کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8943574 1645163 2019 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic behaviour of assemblies of interacting cobalt-carbide nanoparticles
ترجمه فارسی عنوان
رفتار مغناطیسی مونتاژ نانوذرات کربن کارباید
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی
Recent work [1] demonstrated high coercivity and magnetic moment in cobalt carbide nanoparticle assemblies and explained the high coercivity from first principles in terms of the high magnetocrystalline anisotropy of the cobalt carbide nanoparticles. In this work, we comprehensively model the interaction between the nanoparticles comprising the assembly and systematically understand the effect of particle size, distribution of the orientations of the nanoparticles' magnetocrystalline anisotropy axis with respect to the applied magnetic field, and dipole coupling between nanoparticles on the temperature dependent magnetic behavior of the nanoparticle assembly. We show that magnetocrystalline anisotropy alone is not enough to explain the large hysteresis over the 50 K-400 K temperature range and suggest that defects and inhomogeneity that pin the magnetization could also play a significant role on this temperature dependent magnetic behavior.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 469, 1 January 2019, Pages 128-132
نویسندگان
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