Infrared longitudinal and Hall conductivity of SrRuO$_3$ and Ga$_{1-x}$Mn$_x$As films obtained by magneto-polarization measurements

ORAL

Abstract

By measuring the changes in the polarization of transmitted (Faraday effect) and reflected (Kerr effect) mid-infrared (MIR: 115-366 meV) light induced by an external magnetic field, we determine the complete complex magneto-conductivity tensor in SrRuO$_3$ and Ga$_{1-x}$Mn$_x$As films. Thick film transmission and reflection equations are used to convert the measured complex Faraday and Kerr angles into the MIR complex longitudinal conductivity $\sigma_{xx}$ and the complex transverse (Hall) conductivity $\sigma_{xy}$. The resulting $\sigma_{xx}$ is consistent with the values obtained from conventional transmittance and reflectance measurements on these films, as well as the results from Kramers-Kronig analysis of reflectance measurements on similar films.

*Supported by the Research Corporation Cottrell Scholar Award and NSF CAREER Award

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Authors

  • M.-H. Kim

    • Dept. of Physics, Univ. at Buffalo, SUNY, Buffalo, NY

  • G. Acbas

    • Dept. of Physics, Univ. at Buffalo, SUNY, Buffalo, NY

  • M.-H. Yang

    • Dept. of Physics, Univ. at Buffalo, SUNY, Buffalo, NY

  • J. Cerne

    • Dept. of Physics, Univ. at Buffalo, SUNY, Buffalo, NY

  • I. Ohkubo

    • Dept. of Applied Chemistry, Univ. of Tokyo, Tokyo, Japan

  • Hans Christen

    • Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN
    • Oak Ridge National Lab., Materials Science and Technology Division, Oak Ridge, TN
    • Oak Ridge National Laboratory

  • David Mandrus

    • Oak Ridge National Laboratory, Oak Ridge TN 37831
    • Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee
    • Oak Ridge National Laboratory
    • Oak Ridge National Lab., Materials Science and Technology Division, Oak Ridge, TN
    • Oak Ridge National Laboratory, Oak Ridge, TN 37831

  • M.A. Scarpulla

    • Dept. of Materials Science and Engineering, Univ. of California, Berkeley, CA

  • O.D. Dubon

    • Dept. of Materials Science and Engineering, Univ. of California, Berkeley, CA

  • Z. Schlesinger

    • Dept. of Physics, Univ. of California, Santa Cruz, CA