The metamorphosis of heterometallic trinuclear antiferromagnetic complexes into nano-sized superparamagnetic spinels.
The metamorphosis of heterometallic trinuclear antiferromagnetic complexes into nano-sized superparamagnetic spinels.
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DOI:
10.1016/j.matchemphys.2009.12.040
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发表时间:
2010-05-15
影响因子:
4.6
通讯作者:
Pavlishchuk, Vitaly V.
中科院分区:
文献类型:
--
作者:
Vasylenko, Inna V.;Gavrylenko, Konstiantyn S.;Il'yin, Vladimir G.;Golub, Vladimir;Goloverda, Galina;Kolesnichenko, Vladimir;Addison, Anthony W.;Pavlishchuk, Vitaly V.
Thermal decomposition of the trinuclear heterometallic oxoacetates [Fe2M(μ3-O)(CH3COO)6(H2O)3] has been used as a single-precursor method for synthesis of the spinel-structured ternary oxides MFe2O4 (M = MnII, CoII, and NiII). This facile process occurring at 320 °C results in the formation of nanocrystalline, (7–20 nm) highly pure stoichiometric ferrites in quantitative yield. The magnetic properties of these nanoparticulate ferrites were studied in the 10–300 K temperature range, revealing superparamagnetic behaviour for the Ni and Mn particles and ferromagnetic behavior for the Co ones at room temperature. Their blocking temperatures follow the order: CoFe2O4 > MnFe2O4 > NiFe2O4.
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