期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 292, 期 -, 页码 11-16出版社
ELSEVIER
DOI: 10.1016/j.jmmm.2004.10.084
关键词
magnetic nanocrystals; cobalt ferrite; sol-gel; Langmuir-Blodgett
Colloidal cobalt ferrite nanocrystals were produced using a new sol-gel-like synthesis based on the procedure developed by O'Brien et al. (J. Am. Chem. Soc. 123 (2001) 12085) for the synthesis of BaTiO3 nanocrystals. This synthesis involves the single-stage high-temperature hydrolysis of the metal alkoxide precursors to obtain crystalline, uniform, organically coated nanoparticles which are well-dispersed in an organic solvent. The particles could be further manipulated to form Langmuir-Blodgett films consisting of close-packed nanocrystal monolayers. The structural and magnetic properties of these nanocrystals indicate similarity to bulk CoFe2O4 with a very high coercivity at low temperatures. (c) 2004 Elsevier B.V. All rights reserved.
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