  Nickel nanosheets of thickness 0.6 nm were grown within the nanochannels of
Na-4 mica template. The specimens show magnetodielectric effect at room
temperature with a change of dielectric constant as a function of magnetic
field, the electric field frequency varying from 100 to 700 kHz. A decrease of
5% in the value of dielectric constant was observed up to a field of 1.2 Tesla.
This is explained by an inhomogeneous two-component composite model as
theoretically proposed recently. The present approach will open up synthesis of
various nanocomposites for sensor applications.
