TY - JOUR
TI - FMR and magnetization study of ZnFe2O4 nanoparticles in 0.40Fe2O3/0.60ZnO nanocomposite
AU - Typek, J.
AU - Wardal, K.
AU - Guskos, N.
AU - Sibera, D.
AU - Narkiewicz, U.
JO - IEEE Transactions on Magnetics
PY - 2014
VL - 50
TODO - 12
SP - null
PB - Institute of Electrical and Electronics Engineers, Inc. (IEEE)
SN - 0018-9464
TODO - 10.1109/TMAG.2014.2341216
TODO - Crystallite size;  Ferrite;  Ferromagnetic resonance;  Gyrators;  Magnetic anisotropy;  Magnetic materials;  Magnetic moments;  Magnetic susceptibility;  Magnetization;  Nanocomposites;  Nanocrystals;  Nanoparticles;  Paramagnetic resonance;  Resonance;  Temperature distribution;  Zinc;  Zinc compounds;  Zinc oxide, Anisotropy constants;  Ferromagnetic resonance (FMR);  Integrated intensities;  Magnetic characteristic;  Magnetic particle;  Magnetization measurements;  Temperature dependence;  Uniaxial anisotropy fields, Nanomagnetics
TODO - Zinc oxide (ZnO) nanocrystals containing Fe2O3 have been synthesized by the calcination method. Ferromagnetic resonance (FMR) and dc magnetization measurements of 0.40(Fe2O3)/0.60(ZnO) nanocomposite have been carried out in the 4-300 K range to study the magnetic properties of agglomerated magnetic zinc ferrite ZnFe2O4 (ZFO) nanoparticles with an average crystallite size of 12 nm. Temperature dependence of the resonance field, linewidth, and the integrated intensity calculated from FMR spectra have been determined to obtain the value of the uniaxial anisotropy field and to establish the ranges of different relaxation types. Magnetization measurements in ZFC and FC modes as well as the study of hysteresis loops allowed calculating different magnetic characteristics-blocking/freezing temperature, magnetic moment, anisotropy constant, and anisotropy field. The observed magnetic properties of 0.40(Fe2O3)/0.60(ZnO) nanocomposite were explained based on the core-shell model of ZFO nanoparticles. From comparison of FMR and dc magnetization measurements, the temperature ranges of magnetic phases existing in ZFO nanoparticles in 0.40Fe2O3/0.60ZnO nanocomposite are proposed. © 2014 IEEE.
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