Controlled self-assembly of multiferroic core-shell nanoparticles exhibiting strong magneto-electric effects
Abstract
Ferromagnetic-ferroelectric composites show strain mediated coupling between the magnetic and electric sub-systems due to magnetostriction and piezoelectric effects associated with the ferroic phases. We have synthesized core-shell multiferroic nano-composites by functionalizing 10–100 nm barium titanate and nickel ferrite nanoparticles with complementary coupling groups and allowing them to self-assemble in the presence of a catalyst. The core-shell structure was confirmed by electron microscopy and magnetic force microscopy. Evidence for strong strain mediated magneto-electric coupling was obtained by static magnetic field induced variations in the permittivity over 16–18 GHz and polarization and by electric field induced by low-frequency ac magnetic fields.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Feb 03, 2014
- Source ID
- 10.1063/1.4863690
Entities
People
- Ferman A. Chavez
- G. Sreenivasulu
- Gopalan Srinivasan
- M. A. Popov
- Piper R. Lehto
- Sean L. Hamilton
Organizations
- Army Research Office
- Oakland University
- Taras Shevchenko National University of Kyiv