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