Multiferroic and magnetoelectric properties of core-shell CoFe2O4@BaTiO3 nanocomposites

Raidongia, Kalyan; Nag, Angshuman; Sundaresan, A.; Rao, C. N. R.
August 2010
Applied Physics Letters;8/9/2010, Vol. 97 Issue 6, p062904
Academic Journal
Core-shell CoFe2O4@BaTiO3 nanoparticles and nanotubes have been prepared using a combination of solution processing and high temperature calcination. Both the core-shell nanostructures exhibit magnetic and dielectric hysteresis at room temperature and magnetoelectric effect. The dielectric constant of both the nanocomposites decreases upon application of magnetic field. The core-shell nanoparticles exhibit 1.7% change in magnetocapacitance around 134 K at 1 T, while the core-shell nanotubes show a remarkable 4.5% change in magnetocapacitance around 310 K at 2 T.


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