| The results of magnetic susceptibility measurements of weakly doped lithium niobate LiNbO3: Yb (1 wt.%) and LiNbO3: Yb (0.8 wt.%), Pr (0.1 wt.%) single crystals are reported for the first time. The dependence of magnetic susceptibility versus temperature fulfills the Curie € Weiss law. The estimated Curie € Weiss parameter is equal to Θ = €1.1 ± 0.1K and θ = -0.12 ± 0.01K for LiNbO3: Yb and LiNbO3: Yb, Pr, respectively. The magnetic susceptibility measurements confirm the presence of antiferromagnetic interactions between Yb3+ ions in weakly doped LiNbO3: Yb, and LiNbO3: Yb, Pr single crystals. The results of the magnetic susceptibility measurements emphasize an important role of a codopant in the magnetic properties of the main ytterbium impurity in a lithium niobate host lattice. |
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