Hierarchical Assembly of Sm2Co7/Co Magnetic Nanoparticles into Highly Stable and Uniform Nanospheres
Abstract:Hierarchical assembly of colloidal Sm2Co7/Co clusters in the form of nanospheres has been processed through a polyol process. The SmCo nanospheres are found to be robust, uniform (∼100 nm) and tend to self-assemble in the form of ordered superstructures. Each nanosphere consists of large number of discrete fine particles (∼6.0 nm), having two-phase structure of both Sm2Co7 and Co-phases. Upon annealing, these phases transform into Sm2Co17 phase with very high magnetization (169 emu/g). A possible mechanism on the formation of nanospheres from the individual Sm2Co7 and Co nanoparticles is also discussed.
Document Type: Short Communication
Publication date: April 1, 2011
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