Chemical synthesis of hard magnetic SmCo nanoparticles

TitleChemical synthesis of hard magnetic SmCo nanoparticles
Publication TypeJournal Article
Year of Publication2011
AuthorsZhang HW, Peng S, Rong CB, Liu JP, Zhang Y, Kramer MJ, Sun SH
Journal TitleJournal of Materials Chemistry
Date Published11/14
Type of ArticleArticle
ISBN Number0959-9428
Accession NumberWOS:000296026900019
Keywordsalloys, Nanocomposite magnets, permanent-magnets

We report a facile synthesis of ferromagnetic SmCo nanoparticles (NPs) via a controlled reduction of SmCo-O NPs. The SmCo-O NPs were prepared by co-precipitation of Co(II) and Sm(III) acetates with hexadecyl-trimethylammonium hydroxide and were embedded in a CaO matrix. The 7 nm SmCo(3.6)-O NPs were reduced by Ca at 960 degrees C and converted into ferromagnetic 6 nm SmCo(5) NPs with their coercivities reaching 7.2 kOe. The synthesis provides a viable route to ferromagnetic SmCo NPs with controlled compositions and magnetism for high performance permanent magnetic applications.

Alternate JournalJ. Mater. Chem.