Abstract
We report the first measurements of magnetic circular dichroism (MCD) and magneto-optical activity (ratio of zero moments of MCD and absorption bands) of Yb 3+ ion in the trigonal single crystals Yb x Tm 1− x Al 3(BO 3) 4 as a function of temperature in the range of 100–293 K. Magneto-optical activity follows the Curie–Weiss law with the Weiss constant θ=−55 K for Yb 0.1Tm 0.9Al 3(BO 3) 4 crystal. The value and origin of the magneto-optical activity is theoretically analyzed.
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