Temperature- and field-dependent inelastic light scattering studies of TbMnO$_{3}$

ORAL

Abstract

TbMnO$_{3}$ is one of several multiferroic materials that have coexisting magnetic and electric orders that are strongly coupled. Because it is exquisitely sensitive both to structural order and magnetic degrees of freedom, field-dependent inelastic light scattering measurements are ideally suited to studying magnetoelastic coupling and multiferroic phases in materials such as TbMnO$_{3}$.~ By carefully examining the temperature- and field-dependent evolution of new magneto-elastic modes in various phases of TbMnO$_{3}$, our study reveals several new features of the IC-C transition in TbMnO$_{3}$, including the co-existence of distinct structural phases in the intermediate field regime around the IC-C phase transition and evidence for dynamical fluctuations of the IC and C phases outside the established phase boundaries.

*This work was supported by the Department of Energy under Grant No. DE-FG02-07ER46453. MR was supported by the German funding agency under RU 773/3-1.

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Authors

  • H. Barath

    • Dept. of Physics and Frederick Seitz Materials Research Laboratory, Univ. of Ill., Urbana-Champaign
    • Dept. of Physics and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Illinois

  • Minjung Kim

    • Dept. of Physics and Frederick Seitz Materials Research Laboratory, Univ. of Ill., Urbana-Champaign

  • S.L. Cooper

    • University of Illinois at Urbana-Champaign
    • Dept. of Physics and Frederick Seitz Materials Research Laboratory, Univ. of Ill., Urbana-Champaign
    • Dept. of Physics and Frederick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign, Illinois

  • M. Rubhausen

    • Institut fur Angewandte Physik, Univeristat Hamburg, Hamburg, Germany

  • D.N. Argyriou

    • Hahn-Meitner Institut, Berlin, Germany