physica status solidi (a) · 2007 · 13 citations · 4 references
Natural SciencesMaterials EngineeringMaterials ScienceMagnetic MaterialsNanomaterialsNanotechnologyFerrimagnetic MaterialsMagnetic CharacterizationMagnetic NanomaterialsMagnetic OxidesMagnetic Properties Of SolidsMetal Oxide NanomaterialsBlocking TemperatureCoprecipitationCoprecipitation SynthesisFerrite NanoparticlesMagnetic Materials CharacterizationMagnetic NanoparticlesMagnetic PropertiesSuperparamagnetism
Abstract The influence of Zn substitution in the magnetic properties of a nanoscale system Ni 1– x Zn x Fe 2 O 4 (where x = 0.0, 0.25, 0.50 and 0.75) was studied. The ferrites were synthesized by the coprecipitation technique. Transmission electron microscopy revealed a particle size around 4–15 nm, increasing with Zn content. FC/ZFC curves showed a typical superparamagnetic behavior in all samples. It was found that Zn substitution affects both the blocking temperature and the magnetization. The maximum magnetization at room temperature was 48 emu/g for the sample x = 0.50. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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