Magnetic properties of ZnFe2O4 nanoparticles produced by a low-temperature solid-state reaction method |
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Authors: | Fashen Li Haibo Wang Li WangJianbo Wang |
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Affiliation: | Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, Lanzhou 730000, People''s Republic of China |
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Abstract: | ZnFe2O4 nanoparticles with average grain size ranging from 40 to 60 nm behaving superparamagnetic at room temperature have been produced using a low-temperature solid-state reaction (LTSSR) method without ball-milling process. Abnormal magnetic properties such as S-shape hysteresis loops and non-zero magnetic moments were observed. ZnFe2O4 nanoparticles were also synthesized using a NaOH coprecipitation method and a PVA sol-gel method to study the relationship between the preparation processes and the magnetic properties. Spin-glass behavior was observed in the low temperature solid-state reaction produced Zn ferrite in the zero-field cooled (ZFC) measurement. Our work proves that the various preparation methods will to some extent determine the properties of magnetic nanoparticles. |
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Keywords: | 76.80.+y 75.50.Lk 61.46.Df |
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