Annealing effects on magnetic properties of acicular hematite nanoparticles
作者： M.Vasquez Mansilla , R Zysler , D Fiorani , L Suber
DOI: 10.1016/S0921-4526(02)00683-X
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摘要: Abstract The effect of transformation on the structure and magnetic properties α-Fe2O3 acicular nanoparticles (major axis, ∼330 nm; minor ∼70 nm) has been investigated. particles were prepared by hydrolysis polymerization in an aqueous solution FeCl3. Particles as-prepared sample are constituted sub-units 3–5 nm. results indicate that changes samples under thermal treatments (e.g. Morin transition, superparamagnetic behaviour) mainly caused coalesce variation crystallinity nanoparticles.
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