Time-resolved Optical Study of Charge-ordered Manganites.

ORAL

Abstract

We study the effects of applied electric fields and large magnetic fields on the optical properties of Pr$_{(1-x)}$Ca$_{x} $MnO$_{3}$ (x$\sim $0.5) (PCMO) and La$_{(1-x)}$Ca$_{x}$MnO$_{3} $ (x$\sim $0.18) (LCMO) using time-resolved techniques. Our measurements are performed down to 4 K and in dc magnetic fields up to 31 T. The conductivity of the low-temperature strong charge/orbital ordering in PCMO is altered by the application of an electric field and a magnetic field. We demonstrate that time- resolved optical reflection and Kerr effect measurements are capable of capturing these mixed electronic and magnetic effects to gain further insight into the change of the ordering.

*This work is supported by the NHMFL through an UCGP grant.

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Authors

  • Takahisa Tokumoto

  • Judy Cherian

  • Ryan deRosa

  • Paula Sahanggamu

  • Sanhita Ghosh

  • Stephen McGill

    • National High Magnetic Field Laboratory, Florida State University

  • Tesfaye Gebre

  • Haidong Zhou

  • Christopher Wiebe

    • Department of Physics and NHMFL, Florida State University