TEMPERATURE-DEPENDENCE OF THE FARADAY-EFFECT IN RH4-SUBSTITUTED MAGNETIC GARNETS()

The temperature dependence of the Faraday rotation (FR) spectra is mea sured for a single-crystalline (Y3+,Ca2+)(3)(Fe3+,Rb4+)(5)O-12 film gr own by an LPE method onto GGG substrates at temperatures between 60 an d 300 K in the wavelength range of 0.7-1.6 mu m. In addition, the FR s pectra at some temperatures are calculated by a molecular-field approx imation, and the calculated spectra are reproduced well by assuming th e molecular field 155[S-Z(Fe)](cm(-1)), where [S-Z(Fe)] is a thermal a verage of an iron spin S-Z(Fe) in magnetic garnets. (C) 1998 Elsevier Science B.V. All rights reserved.