Multiferroic Switching Dynamics in BiFeO<sub>3</sub>

ORAL

Abstract

With room temperature coupling between magnetic and electric degrees of freedom, BiFeO3 (BFO) has attracted much attention as a leading candidate for magnetoelectric applications. There has been extensive work studying quasi-static magnetoelectric coupling in BFO, but the magnetoelectric coupling dynamics, their fundamental speed limits and intrinsic mechanisms of switching have yet to be explored. We are studying time-domain switching dynamics of the ferroelectric state as the first step in understanding magnetoelectric dynamics. Such studies are challenging, often limited by the platform on which the experiment is performed. Using short electrical pulses with rise time ~100ps and pulse widths of the order of 10ns, we are able to probe the switching of the ferroelectric state on timescales much shorter than previous studies. The data reveal low-nanosecond switching, faster than any formerly reported switching times in (La)BFO. We probe the effects of chemical composition on magnetoelectric switching by studying two model systems, namely BFO and La-doped BFO. We study to what extent multiferroic switching conforms to existing models for classical ferroelectric switching and analyze deviations in the context of magnetoelectric coupling.

*Intel Corporation

–

Presenters

  • Eric Parsonnet

    • University of California, Berkeley

Authors

  • Eric Parsonnet

    • University of California, Berkeley

  • Yen-Lin Huang

    • Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Laboratory, USA
    • Department of Materials Science and Engineering, University of California, Berkeley
    • University of California, Berkeley

  • Chia-Ching Lin

    • Intel Corp.
    • Intel Corporation
    • Intel Corp

  • Tanay Gosavi

    • Intel Corp.
    • Intel Corporation
    • Intel Corp

  • Alexander Qualls

    • University of California, Berkeley

  • Ian Young

    • Intel Corp.
    • Intel Corporation

  • Lane Wyatt Martin

    • DMSE, University of California, Berkeley
    • Department of Materials Science and Engineering, UC Berkeley
    • Department of Materials Science and Engineering, University of California, Berkeley
    • University of California, Berkeley

  • Jeffrey Bokor

    • University of California, Berkeley

  • Ramamoorthy Ramesh

    • Department of Materials Science and Engineering, UC Berkeley
    • University of California, Berkeley, USA
    • University of California, Berkeley
    • Materials Science and Engineering, University of California, Berkeley
    • Department of Materials Science and Engineering, University of California, Berkeley
    • Department of Materials Science and Engineering,, University of California, Berkeley, California 94720, USA