Dynamic Coercivity and Energy Absorption in Ensembles of Superparamagnetic Particles
作者： Igor S. Poperechny , Yuriy L. Raikher
DOI: 10.1109/TMAG.2014.2324653
关键词: Magnetic anisotropy 、 Magnetization 、 Magnetic energy 、 Superparamagnetism 、 Absorption (electromagnetic radiation) 、 Coercivity 、 Condensed matter physics 、 Magnetic hysteresis 、 Materials science 、 Single domain
摘要: Nonlinear magnetization and the ac field energy absorption in single-domain nanoparticles with superparamagnetic behavior are considered. The exact kinetic description is reduced by retaining only essential part of magnetic response. Simple analytical formulas delivering dynamic coercivity hysteresis loop area, i.e., per cycle, obtained. good accuracy these expressions respect to temperature, frequency, amplitude dependences demonstrated comparison full numerical solutions.
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