title: 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 Sm2Co2o7 and Co nanoparticles is also discussed.
authors.affiliation: Advanced Magnetics Group, Defence Metallurgical Research Laboratory, Hyderabad 500058, India.
authors.forename: P
authors.initials: P
authors.lastname: Saravanan
authors.forename: B
authors.initials: B
authors.lastname: Sreedhar
authors.forename: D
authors.initials: D
authors.lastname: Mishra
authors.forename: A
authors.initials: A
authors.lastname: Perumal
authors.forename: V
authors.initials: V
authors.lastname: Chandrasekaran
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008280:Magnetics; D008422:Materials Testing; D008968:Molecular Conformation; D054118:Nanospheres / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012493:Samarium / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D046911:Macromolecular Substances; D003035:Cobalt; D012493:Samarium; C053755:samarium cobalt