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Host

  • Professor Jun Chen

    School of Mathematics and Physics, University of Science and Technology Beijing, Beijing, China.
    Executive Editor Of Microstructures

Speaker(s)

  • Professor Jinbo Yang

    School of Physics, Peking University.

    Jinbo Yang, Professor of Physic, Peking University. Dr. Yang received his Ph.D. in Condensed Matter Physics from the Peking University (PKU) in 1998. He received the Alexander von Humboldt Fellowship and performed a post-doctor at IFW-Dresden Germany from 1998-2000. He then worked in University of Missouri-Rolla (UMR) from 2001-2008. He became a full Professor in PKU in 2008. Prof. Yang is Member of the International Rare Earth Permanent Magnetic Materials Advisory Committee, Member of the International IEEE Magnetic Technology Committee, Member of the Organizing Committee of the International Conference on Magnetics and Magnetic Materials, Member of the Chinese Neutron Scattering Committee, Member of the Academic Committee of the National Key Laboratory of Magnetism, Member of the Academic Committee of the National Key Laboratory of Rare Earth Magnetic Materials Engineering, etc. His research works focus on the magnetic materials, magnetism and spintronics involving the relationship between structure and physical properties of the novel magnetic functional materials, neutron scattering and magnetism, novel permanent and soft magnetic materials. He has published more than 250 peer-reviewed SCI papers and authorized more than ten patents. He has received National Natural Science award(second prize), the national 100 excellent doctoral thesis award, and others.

Introduction

The spin-orbit torque(SOT) effect provides an efficient way to manipulate the magnetic moment electrically and is a crucial technology for developing the next-generation low-energy, high-speed non-volatile magnetic memory. In this talk, I will present our results of the SOT and Dzyaloshinskii-Moriya interaction (DMI) in light-element metal oxides (CuOx) and magnetic insulator (RIG) system via magnetic and transport measurement. Different from the traditional system composed of heavy metals and magnetic metal materials, on the one hand, the light-element metal oxide interface can generate orbital current via the orbital Rashba-Edelstein effect and then convert the orbital current to spin current, resulting in an enhanced spin-orbit torque stronger than that in pure heavy metals; on the other hand, thanks to the unique properties of electrical insulation, magnetic conduction, low magnetization and low magnetic damping in magnetic insulator materials, it can reduce the current for magnetization reversal and improve the speed of magnetization reversal. Through the systematic characterization of the atomic structure, magnetic structure, and spin torques, we proposed the mechanism of the generation of orbital current, the conversion of orbital current-to-spin current, and the absorption process of spin current, and find out how to improve the efficiency of magnetic moment manipulation. Our research will provide a physical and material basis for designing and developing high-performance spin-orbit torque magnetic random-access memory (SOT-MRAM).

Presentation

  • Exchange Coupling and Spin-Orbit Torques in Magnetic Heterostructures: Part 1 Introduction of Microstructures and Speaker
  • Exchange Coupling and Spin-Orbit Torques in Magnetic Heterostructures: Part 2: Report
  • Exchange Coupling and Spin-Orbit Torques in Magnetic Heterostructures: Part 3: Discussion

Moments

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