The Role of 4f–4f Transitions in Magnetooptics of Paramagnetic Rare–Earth Glasses

Abstract Theoretical and experimental investigations are made of magnetooptical activity (MOA) of (parity) forbidden intraconfigurational 4f–4f transitions in Er(PO 3 ) 3 rare‐earth paramagnetic phosphate glasses. The interpretation of magnetooptical spectra in frames of a theoretical scheme similar to Judd‐Offelt's theory is carried out for the observed 4f–4f transitions. It is shown that the theory may be used successfully for the quantitative description of magnetic circular dichroism (MCD) spectra (and Faraday effect spectra) in rare‐earth paramagnetic glasses.

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