Theory for the giant magneto-optical Kerr rotation in CeSb

Details Theory for the giant magneto-optical Kerr rotation in CeSb Theory for the giant magneto-optical Kerr rotation in CeSb

1996-08-28

arxiv.org/abs/cond-mat/9608142v2

Physics

Condensed Matter

12 pages, Revtex, 4 +1 postscript figures, new: condition (5) and its disc. at p. 6, discussion of relation to magnetism, magn

Scientific paper

We calculate the linear magneto-optical Kerr rotation angle for CeSb in the near-infrared spectral range. Using an exact formula for large Kerr rotation angles and a simplified electronic structure of CeSb we find at $\hbar \omega = 0.46 eV$ a Kerr rotation of 90 degrees which then for decreasing $\omega $ jumps to -90 degrees in very good agreement with recent experimental observations. We identify the general origin of possible 90 degree polarization rotations from mainly optical properties and discuss its relation to the magnetic moments and magnetic dichroism of the material.

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