High Temperature XPS Studies of a Single Crystal of Magnetoelectric TbMnO$_{3}$

ORAL

Abstract

Recent interest in magnetoelectric and unconventional magnetic phenomena in materials such as the RMnO$_{3}$ series (R=Rare Earth) reveals competing electronic ground states, together with electronic and crystal structure phase transitions both above and below room temperature[1]. A complete elucidation of these phenomena calls for detailed studies of electronic properties at varying temperatures. Using a new high temperature insert with a resistive heater stage fitted to a Cylindrical Mirror Analyzer at the Synchrotron Radiation Center in Stoughton, WI, we have performed x-ray photoemission studies at variable temperatures (200-1000K) in a large single crystal of magnetoelectric orthorhombic TbMnO$_{3}$ (0.5 x 0.5 x 1cm) grown by us from a floating zone. We observe peak splitting in the Mn 3p and Tb 4d peaks near a structural distortion observed by us. Together with resistivity and detailed Rietveld analysis of powder x-ray diffraction, we ascribe this to possibly an orbital order-disorder transition around 900K. [1]J.S.Zhou,Phys.Rev.Let. 96,247202(2006)

–

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

  • 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

  • Marshall Onellion

    University of Wisconsin-Madison

  • 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