Self-Assembled Multiferroic Nanostructures and Studies on Magnetoelectric Interactions
Abstract
Ferromagnetic ferroelectric composites show strong magneto-electric (ME) coupling at room temperature that is mediated by mechanical forces. The focus of the proposed effort was on ME interactions in core-shell nanoparticles and nanowires of ferrite-piezoelectrics. The large surface area-to-volume ratio for the nanocomposites is expected to lead to a much stronger ME interactions compared to bulk materials. We modeled ME interactions in nanobilayers, nanopillars and nanotubes comprising a ferroelectric phase and a ferromagnetic phase. The model for low frequency ME coupling predicted a substantial reduction in ME coefficients in nanobilayers on a substrate due to substrate clamping, but the clamping effects can be substantially reduced in core-shell particles and coaxial wires. The important inferences from the models were the prediction of strong ME coupling at low-frequencies and at resonance modes in nanocomposites and the potential for novel devices based on the phenomena for high frequency electronics.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 27, 2018
- Accession Number
- AD1071833
Entities
People
- Gopalan R. Srinivasan
Organizations
- Oakland University