Nanoscale Multiferroics For Future Electro-Magnetic
Present day electromagnetic devices rely on a discovery made by Oersted 200 years ago where a current passing through a wire generates a magnetic field. While extremely useful this approach has significant limitations in the small scale. Recent discoveries suggest that a ferromagnetic material’s intrinsic magnetization can be manipulated with an electric field and thereby overcome the deficiencies associated with Oersted’s discovery. One multiferroic approach relies on mechanically coupling a piezoelectric material to a magnetostrictive material where an electric field induces a strain to reorient the magnetostrictive material’s magnetization state. Using physical phenomenon present in nanoscale magnetic elements significantly enhances the electric field induced magnetic changes with efficiencies that could approach 60%. This presentation will provide motivation, experimental data, and potential applications (memory, motors, and antennas) multiferroic materials offer the engineering/scientific community.