Phase Diagram of Floating Zone grown Multiferroic SmMnO$_{3}$ and Mn site substitutions.

POSTER

Abstract

SmMnO$_{3}$, a member of a Rare Earth manganite series of current interest due to the observation of multiferroic magnetoelectricity, anisotropy in magnetic properties and an unconventional ``compensation temperature'' $\sim $8K possibly arising from antiparallel Sm--Mn exchange interactions. Of particular interest here is charge disproportionation of Mn, competing magnetic and orbital order, and the proximity to a metal-insulator transition [1]. We report detailed studies of a high-quality single crystal of SmMnO$_{3}$ grown from a floating zone, and the result of Mn-site substitution by elements with multiple valence states and octahedral coordination. We discuss magnetization, crystal structure refinement, and dielectric spectroscopy in 0.3$<$T$<$300 Kelvin and 0$<$H$<$9Tesla. [1] Kurbakov, et.al., A, Physics of the Solid State, 46 -9~(2004) 1704

*NSF, RGI

Authors

  • Somaditya Sen

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

  • Larry Buroker

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

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

  • Mark Williamsen

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

  • 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