Electronic conduction in doped multiferroic BiFeO$_{3}$

ORAL

Abstract

Competition between multiple ground states, that are energetically similar, plays a key role in many interesting material properties and physical phenomena as for example in high-$T_{c}$ superconductors (electron kinetic energy vs. electron-electron repulsion), colossal magnetoresistance (metallic state vs. charge ordered insulating state), and magnetically frustrated systems (spin-spin interactions). We are exploring the idea of similar competing phenomena in doped multiferroics by control of band-filling. In this paper we present systematic investigations of divalent Ca doping of ferroelectric BiFeO$_{3}$ in terms of structural and electronic conduction properties as well as diffusion properties of oxygen vacancies.

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Authors

  • C.-H. Yang

    • Department of Physics, and Material Science and Engineering, University of California, Berkeley, CA 94720, USA.
    • Department of Physics, UC Berkeley

  • J. Seidel

    • University of Califonia at Berkeley
    • UC Berkeley
    • UC Santa Barbara
    • University of Cambridge
    • FZ Dresden-Rossendorf, Germany
    • Oakridge National Lab
    • Lawrence Berkeley National Lab
    • TU Dresden, Germany
    • National Chiao Tung University, Taiwan
    • Department of Physics, and Material Science and Engineering, University of California, Berkeley, CA 94720, USA.
    • Department of Physics, UC Berkeley

  • Sang-Yong Kim

    • Department of Physics, and Material Science and Engineering, University of California, Berkeley, CA 94720, USA.

  • M. Gajek

    • University of Califonia at Berkeley
    • Department of Physics, and Material Science and Engineering, University of California, Berkeley, CA 94720, USA.
    • Department of Physics, UC Berkeley

  • P. Yu

    • Department of Physics, and Material Science and Engineering, University of California, Berkeley, CA 94720, USA.

  • M.B. Holcomb

    • University of California Berkeley
    • Department of Physics, and Material Science and Engineering, University of California, Berkeley, CA 94720, USA.

  • L. Martin

    • University of Califonia at Berkeley
    • Department of Physics, and Material Science and Engineering, University of California, Berkeley, CA 94720, USA.

  • R. Ramesh

    • University of California at Berkeley
    • University of California, Berkeley, CA, 94720
    • University of California-Berkeley
    • Department of Physics, and Material Science and Engineering, University of California, Berkeley, CA 94720, USA.
    • Department of Physics, UC Berkeley
    • Dept. of Materials Science and Engineering, University of California, Berkeley, CA 94720

  • Y.-H. Chu

    • Department of Material Science and Engineering, National Chiao Tung University, HsinChu 30010, Taiwan.
    • Department of Materials Science and Engineering, National Chiao Tung University