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- W2945667789 abstract "The study of nanoscopic magnetic systems of granular materials is an interesting subject for fundamental research in the field of condensed matter physics that can be modeled through convenient theory. Here, we evaluate the attempt time τ0 and magnetic anisotropy energy barrier Ean of magnesium ferrite (MgFe2O4) samples annealed at different temperatures using scaling plots from ac magnetic susceptibility data. The scaling of ln(τ) versus 1/Tm″ is valid for a range of annealing temperatures. Particularly, we identify MgFe2O4 nanoparticles with an increase in size and the emerging of agglomerates, which are also corroborated by data from XRD, TEM, and magnetic measurements. By analyzing ZFC-FCW curves and working out ⟨HC⟩T, we show that the model describing noninteracting monodomain nanoparticles remains valid for samples without agglomerates, as long as the received thermal energy does not surpass a given threshold value. For increasing annealing energy, the magnetic anisotropy energy barrier is substanti..." @default.
- W2945667789 created "2019-05-29" @default.
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- W2945667789 date "2019-05-14" @default.
- W2945667789 modified "2023-09-23" @default.
- W2945667789 title "Coercive Field Model for Description of Mono- and Multidomain Magnetic Granular Systems" @default.
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- W2945667789 doi "https://doi.org/10.1021/acs.jpcc.8b11246" @default.
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