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Effect of deviation from stoichiometric composition on structural and magnetic properties of cobalt ferrite, CoxFe3-xO4 (x=0.2 to 1.0)

TitleEffect of deviation from stoichiometric composition on structural and magnetic properties of cobalt ferrite, CoxFe3-xO4 (x=0.2 to 1.0)
Publication TypeJournal Article
Year of Publication2012
AuthorsNlebedim IC, Snyder JE, Moses AJ, Jiles DC
Journal TitleJournal of Applied Physics
Volume111
Pages07d704
Date Published04
Type of ArticleArticle
ISBN Number0021-8979
Accession NumberWOS:000303282401167
Abstract

The effects of deviation from stoichiometric composition on the structural and magnetic properties of cobalt ferrite, CoxFe3-xO4 (x = 0.2 to 1.0), are presented. Both CoFe2O4 and Fe3O4 have a spinel crystal structure, and it might be expected that intermediate compositions would have the same structure. However, results show that synthesis via the ceramic method leads to the development of a secondary alpha-Fe2O3 phase. Both structural and magnetic properties are altered depending on the concentration of the alpha-Fe2O3 phase. Saturation magnetization is at a maximum for the stoichiometric composition (i.e., x = 1.0) and thereafter decreases with x. In attempts to achieve the properties required for application, the ceramic method offers the ability to selectively adjust the concentrations of both CoFe2O4 and alpha-Fe2O3 phases. (C) 2012 American Institute of Physics. [doi:10.1063/1.3670982]
URL<Go to ISI>://WOS:000303282401167
DOI10.1063/1.3670982
Alternate JournalJ. Appl. Phys.