Saravanan P, Sreedhar B, Mishra D, Perumal A, Chandrasekaran V
Advanced Magnetics Group, Defence Metallurgical Research Laboratory, Hyderabad 500058, India.
J Nanosci Nanotechnol. 2011 Apr;11(4):3706-10. doi: 10.1166/jnn.2011.3819.
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 Sm2Co2o7 and Co nanoparticles is also discussed.
