Microstructure and surface composition of ferromagnetic thick films prepared with NiCo polyol-derived powders

A cobalt alkoxide, Co(OCH 2 CH 2 O), has been prepared from the reaction of cobalt acetate with ethanediol. This compound crystallizes as disk-shaped particles with diameter and thickness in the 0.4-1 mm and 100-250 nm ranges, respectively. Structural characterization (X-ray and electron diffraction) shows a layered arrangement with a brucite-like structure presenting a turbostratic disorder. The interlayer spacing and the CoÁ Á ÁCo distance within the layer are c = 8.27 A ˚and a = 3.09 A ˚, respectively. UV-visible spectroscopy studies established that the Co(II) ions are located on octahedral sites. IR spectroscopy showed that the ethylene glycolate anions (OCH 2 CH 2 O) 2À chelate the Co(II) cations. The magnetic properties of the compound were measured in the range of 2-300 K. Below 20 K, the compound exhibits 3D ferromagnetic order and the hysteresis loop shows a very high remanence-to-saturation ratio typical of a uniaxial magnetocrystalline anisotropy.

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Prudenziati

2012

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Microstructure and surface composition of ferromagnetic thick films prepared with NiCo polyol-derived powders

Cited by 3 publications

References 33 publications

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Synthesis, characterization and magnetic properties of disk-shaped particles of a cobalt alkoxide: Coⁱⁱ(C₂H₄O₂)

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Microstructure and surface composition of ferromagnetic thick films prepared with NiCo polyol-derived powders

Cited by 3 publications

References 33 publications

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Synthesis, characterization and magnetic properties of disk-shaped particles of a cobalt alkoxide: Coii(C2H4O2)

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Synthesis, characterization and magnetic properties of disk-shaped particles of a cobalt alkoxide: Coⁱⁱ(C₂H₄O₂)