Abstract
The present paper reports a study of ordered anisotropic cobalt nanoparticles arrays formed in mesoporous aluminosilicate matrices with pore diameters of 2 nm (MAS). The strategy of synthesis was based on intercalation of hydrophobic cobalt complex (Co2(CO)8) to the hydrophobic part of MAS/CTAB composite with subsequent reduction of metal. Ordering parameters and magnetic structure of nanocomposites were investigated by small-angle neutron scattering (SANS) and SQUID measurements. It was shown that the suggested method leads to formation of well-ordered magnetic nanowire arrays with periodicity of 4.32–4.37 nm. SANS studies indicate spatial correlation between magnetic and nuclear structure of nanocomposites. The composites demonstrate high blocking temperatures exceeding 300 K, large enough coercive force (up to 18,700 A/m) and saturation magnetization (16 A⁎m2/kg) at room temperature.
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