NEAR IR FARADAY ROTATION ON YIG DOPED WITH TETRAVALENT AND PENTAVALENT ELEMENTS

We report 300 and 4 K Faraday Rotation measurements in function of wavelength on bulk YIG doped with tetravalent (Ge, Sn, Zr) or pentavalent elements Sb.On the samples doped with octahedral localized dopage we observe spectra with maxima at 1.1, 1.45 and 2.05 pm and a strong dip at 1.75 pm.We analyse them in connection with Magnetic Circular Dichroism measurements.