The infra-red refractive index of garnet ferrites

Abstract

The refractive index has been measured by the method of minimum deviation on single crystals of Y3Fe5O12 and Gd1.5Y1.5Fe5O12. The index was found to be 2.168 ± 0.003 at 3.0 μm with a variation of the order of 5% between 1 and 6 μm. It is concluded that the Faraday rotation should vary in sympathy with the index in this region.