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.

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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