10 August 2001 Gd3+-Yb3+ exchange interactions in LiYbxY1-xF4 single crystals
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The evaluated Gd3+-Yb3+ exchange interactions over the nearest and the next-nearest neighbors in LiYbxY1-1F4 are found to increase in parabolic manner with x, the concentration of Yb3+ ions. The Gd3+-Yb3+ exchange interactions are sensitive to x in the range x equals 0.6-1.0, while they are almost constant in the range x- equals 0.1-0.5. The estimated Gd3+-Yb3+ exchange interaction constants are in the range 0.5-2.8 Ghz for x from 0.1 to 1, respectively. These exchange interaction constants are increased with lowering temperature. The results are comparable to those of estimated using the molecular-field model. The average Gd3+-Yb3+ pari exchange interaction constant is determined to be 0.33 Ghz in paramagnetically diluted LiYbxY1-xF4 crystals.
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Lucjan E. Misiak, Lucjan E. Misiak, } "Gd3+-Yb3+ exchange interactions in LiYbxY1-xF4 single crystals", Proc. SPIE 4412, International Conference on Solid State Crystals 2000: Growth, Characterization, and Applications of Single Crystals, (10 August 2001); doi: 10.1117/12.435820; https://doi.org/10.1117/12.435820

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