Low Temperature Phase Transitions in Single Crystal Magnetoelectric GdMnO$_{3}$

POSTER

Abstract

GdMnO$_{3}$ is proposed to have a magnetic phase transition from paramagnet to incommensurate antiferromagnet at 43K, further ordering to canted antiferromagnetism around 23K, followed by Gd magnetic ordering at 6.5K[1]. We present further studies of a large single crystal of orthorhombic GdMnO$_{3}$ grown by us from a floating zone, revealing additional features at lower temperature. Dielectric spectroscopy measurements confirm these new features. We also report dc-magnetization, frequency dependent ac-magnetization 2-300K, and specific heat 0.4-300K in a variable magnetic field 0-9T, and propose additional features in the magnetoelectric phase diagram. [1]T. Kimura,Phys.Rev.B 71,224425(2005)

Authors

  • 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

  • Shishir Ray

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

  • 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

  • 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

  • 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