Magnetodielectric effect in nickel nanosheet-Na-4 mica composites
DST Unit on Nano Science, Indian Association for The Cultivation Of Science - Jadavpur, Kolkata-700032, India
2 Department of Physics, University of Calcutta - Kolkata-700009, India.
3 Centre for Nanotechnology for Photovoltaics and Sensor Devices, Indian Association for the Cultivation of Science Kolkata-700032, India
Accepted: 8 October 2010
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 the dielectric constant was observed up to a field of 1.2 T. 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.
PACS: 62.23.Pq – Composites (nanosystems embedded in a larger structure) / 72.20.My – Galvanomagnetic and other magnetotransport effects / 81.07.Bc – Nanocrystalline materials
© EPLA, 2010