Irreversible Photoinduced Changes in Optical Absorption of YIG(Si4+) and YIG(Ca2+)
- 15 March 1971
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 42 (4) , 1454-1455
- https://doi.org/10.1063/1.1660290
Abstract
Irradiation by white light at low temperatures produces drastic changes in the near‐infrared absorption coefficient of YIG doped with divalent Ca or quadrivalent Si. For Ca2+ doping, α increases; for Si4+ doping, α decreases on irradiation. In both cases the magnitude of the effect varies sharply with concentration. For YIG(Si) the results are interpreted in terms of the different properties of Fe2+ in sites that are near or far from the Si4+ ions. A similar model holds for YIG(Ca) with Fe4+ rather than Fe2+ being the important impurity. In both cases irradiation enhances occupation of the far sites.This publication has 6 references indexed in Scilit:
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