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Enhanced magnetooptical response in dumbbell-like Ag-CoFe2O4 nanoparticle pairs
Yanqiu Li1, Qiang Zhang, Arto V Nurmikko
1Department of Physics, Brown University, Providence, Rhode Island 02912, USA. Yanqiu_Li@brown.edu
Nano Letters
|September 15, 2005
Abstract:
We study magnetooptical Faraday rotation in a colloidal solution of "dumbbell-like", physically conjoined nanoparticle pairs composed of a ferromagnetic (CoFe2O4) and a noble metal (Ag). We show that outside the CoFe2O4 interband dominated spectral regime, the coupled dumbbells show significantly enhanced magnetooptic response relative to single CoFe2O4 nanoparticles, derived from plasmonic contribution by the Ag nanoparticles.

