INFLUENCE OF PARTICLE SIZE DISTRIBUTION ON SPECIFIC LOSS POWER OF MAGNETIC NANOPARTICLE

Luu Huu Nguyen

Abstract


In this study, the influence of particle size distribution in the range of σ =0-0.4 on the specific loss power (SLP) in magnetic fluids based on nanoparticles (NPs) of 6 materials of FeCo, La0.3Sr0.7MnO3, MnFe2O4, g-Fe2O3, CoFe2O4 and FePt was evaluated using Linear Response Theory (LRT). Results show that while the particle diameters Dcp of maximum SLP remain unchanged, the SLPmax values decrease with increasing size distribution for all the studied materials. The reduction behaviors can be classified into 2 groups, namely group with strong and weak decrease rate for low-anisotropy (FeCo, La0.3Sr0.7MnO3, MnFe2O4, g-Fe2O3), and  high-anisotropy (CoFe2O4 and FePt) materials, respectively.



Keywords


specific loss power (SLP); particle size distribution; Néel – Brown; standard deviation.

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DOI: https://doi.org/10.15625/2525-2518/56/1A/12507

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Published by Vietnam Academy of Science and Technology