Polarization switch on h-LuFeO3 multiferroic

ORAL

Abstract

The properties of improper ferroelectrics are knowing to be very different from properties present in the proper ferroelectrics. However, the switching behavior of the electric polarization and the dynamics of the ferroelectric domain walls in the multiferroics with improper ferroelectricity don't have been yet reported. In this work, we study the ferroelectric properties of hexagonal LuFeO3 (h-LFO). This structure was firstly obtained in 2004 [1], but its properties are yet not all understood. The epitaxial thin films of h-LFO on YSZ(111) was produced by pulsed laser deposition. The switch of polarization was studied in the screen of Ishibashi-Orihara model [2]. We have observed that the electrical coercive field in improper ferroelectric (h-LFO) grow very fast with the frequency if compared with proper ferroelectric (e.g. PbTiO3 or BiFeO3). In this presentation, we also will discuss mechanisms to reduce the electrical coercive field as well as how to reduce the dependence of the electrical coercive field with the frequency.
[1] A.A. Bossak et al., Chem. Mater. 16 (2004) 1751.
[2] S. Hashimoto et al., J. Phys. Soc. Japan. 63 (1994) 1601.

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Presenters

  • Petrucio Barrozo da Silva

    Physics Department, Federal University of Sergipe, Physics Department, Univesity of California, Berkeley

Authors

  • Petrucio Barrozo da Silva

    Physics Department, Federal University of Sergipe, Physics Department, Univesity of California, Berkeley

  • Bhagwati Prasad

    University of California, Berkeley, Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA., Physics Department, Univesity of California, Berkeley, Department of Materials Science and Engineering, University of California, Berkeley

  • Vishal Thakare

    Physics Department, Univesity of California, Berkeley

  • Sujit Das

    Department of Materials Science and Engineering, University of California at Berkeley, Department of Materials Science & Engineering, University of California, Berkeley, University of California, Berkeley, Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA., Physics Department, Univesity of California, Berkeley

  • Ramamoorthy Ramesh

    Physics Department, Univesity of California, Berkeley