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Magneto-optical Investigation of the Band Edge of CdCr2S4 and Related Absorption Measurements on Cr-doped CdIn2S4

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2 Author(s)
Wittekoek, S. ; Philips Research Laboratories, N. V. Philips Gloeilampenfabrieken, Eindhoven, The Netherlands ; Bongers, P.F.

The 4T1 and 4T2 crystal-field transitions of Cr3+ have been observed in the absorption spectrum of CdIn2S4(Cr). From the similarity between the temperature dependence of the 4T2 band and the reported blue shift of the absorption edge of CdCr2S4 it is concluded that in CdCr2S4 this edge is caused by the 4T2 absorption band of the Cr3+ ions. The polar magneto-optic Kerr effect between 560 and 700 nm and the Faraday rotation between 800 and 8000 nm are reported for CdCr2S4. The Kerr effect spectrum indicates that the intrinsic band edge of CdCr2S4 is at 1.91 eV at 60°K and shifts to lower energies with decreasing temperature.

Note: The Institute of Electrical and Electronics Engineers, Incorporated is distributing this Article with permission of the International Business Machines Corporation (IBM) who is the exclusive owner. The recipient of this Article may not assign, sublicense, lease, rent or otherwise transfer, reproduce, prepare derivative works, publicly display or perform, or distribute the Article.  

Published in:

IBM Journal of Research and Development  (Volume:14 ,  Issue: 3 )

Date of Publication:

May 1970

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