Electric-field control of magnetism in multiferroic heterostructures

ORAL

Abstract

We have studied electric-field control of magnetism in different multiferroic heterostructures, composed of ferromagnetic (FM) and ferroelectric (FE) materials such as Co40Fe40B20(CoFeB)/Pb(Mg1/3Nb2/3)0.7Ti0.3O3(PMN-PT) and magnetic tunnel junctions (MTJ) on PMN-PT, etc. A giant electric-field control of magnetization as well as magnetic anisotropy was observed in a CoFeB/PMN-PT structure at room temperature with a maximum relative magnetization change up to 83 percent and a 90$^{\circ}$ rotation of the easy axis. In MTJ of CoFeB/AlOx/CoFeB grown on PMN-PT, we demonstrate a reversible, continuous magnetization rotation and manipulation of tunneling magnetoresistance at room temperature by electric fields without the assistance of a magnetic field. These results show the interesting new physics and potential applications of the FM/FE multiferroic heterostructures.

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Authors

  • Yong Zhao

    • Department of Physics, Tsinghua University, Beijing 100084, China
    • Tsinghua University
    • Department of physics, Tsinghua University

  • Sen Zhang

    • Tsinghua University and National University of Defense Technology

  • Peisen Li

    • Tsinghua University

  • Aitian Chen

    • Tsinghua University

  • Dalai Li

    • Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences

  • Lifeng Yang

    • Tsinghua University

  • S. Rizwan

    • Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences

  • Y. Liu

    • Tsinghua University

  • Xia Xiao

    • Fudan University

  • Yizheng Wu

    • Fudan University

  • Xiaofeng Jin

    • Fudan University

  • Xiufeng Han

    • Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences

  • Huiyun Zhang

    • Tsinghua University

  • Meihong Zhu

    • Tsinghua University