Electric field control of nonvolatile four-state magnetization at room temperature

ORAL

Abstract

We find the realization of large converse magnetoelectric (ME) effects at room temperature in a multiferroic hexaferrite Ba$_{0.52}$Sr$_{2.48}$Co$_{2}$Fe$_{24}$O$_{41}$ single crystal, in which rapid change of electric polarization in low magnetic fields (about 5 mT) is coined to a large ME susceptibility of 3200 ps/m. The modulation of magnetization then reaches up to 0.62 $\mu _{B}$/f.u. in an electric field of 1.14 MV/m. We find further that four ME states induced by different ME poling exhibit unique, nonvolatile magnetization versus electric field curves, which can be described by an effective free energy with a distinct set of ME coefficients. *These authors contributed equally to this work.

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Authors

  • Sae Hwan Chun*

    CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • Yi Sheng Chai*

    CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • Byung-Gu Jeon

    CeNSCMR, Seoul National University, CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • Hyung Joon Kim

    CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • Yoon Seok Oh

    CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • Ingyu Kim

    CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • Hanbit Kim

    CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • Byeong Jo Jeon

    CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • So Young Haam

    CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • Ju-Young Park

    CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • Suk Ho Lee

    CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • Kee Hoon Kim

    CeNSCMR, Seoul National University, CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea

  • Jae-Ho Chung

    Department of Physics, Korea University, Seoul 136-713, Korea

  • Jae-Hoon Park

    Department of Physics, POSTECH, Korea, Dept. Physics, Pohang University of Science and Technology, Korea, Department of Physics and Division of Advanced Materials Science, POSTECH, Pohang 790-784, Korea