Temperature Dependence of Faraday Rotation in Co 2+-Substituted Hexaferrites

Abstract
The temperature dependence of the Faraday rotation in the near-infrared wavelength region is calculated in comparison with that observed in Co2+-containing hexaferrites by using the molecular field approximation. The calculation results show that the Faraday rotation decreases in the whole wavelength region and shifts to a lower energy with an increase in temperature, which is in agreement with the experimental results.