Cao Yang, Assistant Professor of Tohoku University, Japan, was invited to give a report titled "Discovery and Performance Regulation of Tunneling Magneto-Dielectric Effect".
At 10:00 am on October 35, 2021, Cao Yang, Assistant Professor of Tohoku University, Japan, was invited to give a report in Conference Room 530, 5th Floor, Contemporary Building, entitled "Discovery of Tunnel Magneto-Dielectric Effect and Performance Regulation".
Introduction to the report: The magnetoelectric effect, that is, controlling the electrical polarization properties of materials through a magnetic field, has attracted extensive attention in both the basic research field of condensed matter physics and device applications such as magnetic sensing and magnetic storage. The scarcity of single-phase room-temperature magnetoelectric materials and the development of physical fabrication techniques have prompted researchers to develop two heterostructured composites. At present, the strain-mediated interaction between piezoelectric phase and magnetostriction is mainly used in composite materials. This report will introduce a novel room-temperature magnetoelectric effect discovered by our group in nanoparticle composite films. The quantum tunneling effect induced by a magnetic field induces an increase in the dielectric constant of the material, and is named "tunneling magneto-dielectric effect" (TMD). ). The latest theoretical progress of the TMD effect is shown, and a series of device-based applications such as how to improve the TMD response and modulate the frequency response characteristics of the TMD are discussed. Finally, on this basis, we briefly introduce the "tunneling electromagnetic-dielectric (TEMD) effect" recently discovered by the reporter, which shows greater advantages and application prospects than TMD.
