Studies of Competing Order in Multiferroic RMnO$_{3}$

ORAL

Abstract

Unconventional magnetic order, a ferroelectric background and the possibility of coupled ground states, together with competing spin, charge, lattice and orbital degrees of freedom, give systems such as $R$MnO$_{3}$ ($R$=Rare Earth), an ABO$_{3}$-type compound, a rich and fascinating phenomenology. The possibility of using these materials in switching, in spin based electronics, and as materials with negative refractive index, make them important candidates for device applications. Here we present a review of our studies of the detailed phenomenology of a series of single crystals of $R$MnO3 grown from a floating zone, for different Rare Earths $R$, and by inducing structural distortions and charge disproportionation through substitutions at both the A and the B sites.

*Acknowledgements: NSF, UWM RGI, NASA, AAF

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Authors

  • Prasenjit Guptasarma

    • Physics Dept., Univ. of Wisconsin, Milwaukee, 1900 E Kenwood Blvd. Milwaukee, WI 53211, USA
    • University of Wisconsin-Milwaukee, USA
    • University of Wisconsin-Milwaukee
    • Physics Dept., Univ. of Wisconsin, 1900 E Kenwood Blvd., Milwaukee, WI 53211, USA
    • University of Wisconsin - Milwaukee, USA
    • Dept of Physics, University of Wisconsin-Milwaukee, USA

  • Ying Zou

    • Physics Dept., Univ. of Wisconsin, Milwaukee, 1900 E Kenwood Blvd. Milwaukee, WI 53211, USA
    • University of Wisconsin-Milwaukee, USA
    • University of Wisconsin-Milwaukee
    • Physics Dept., Univ. of Wisconsin, 1900 E Kenwood Blvd., Milwaukee, WI 53211, USA
    • University of Wisconsin - Milwaukee, USA
    • Dept of Physics, University of Wisconsin-Milwaukee, USA

  • Shishir Ray

    • Dept of Physics, University of Wisconsin-Milwaukee, USA

  • Somaditya Sen

    • Dept of Physics, University of Wisconsin-Milwaukee, USA

  • Mark Williamsen

    • Dept of Physics, University of Wisconsin-Milwaukee, USA