A series of heterometallic 3d-4f hydroxyl sulfate-fluoride compound Ln2Cu(SO4)2(OH)3F•H2O (Ln = Gd, Ho, Yb)

A series of heterometallic 3d-4f hydroxyl sulfate-fluoride compound Ln(2)Cu(SO4)(2)(OH)(3)F center dot H2O (Ln = Gd, Ho, Yb) are synthesized by a conventional hydrothermal method. All of Ln(2)Cu(SO4)(2)(OH)(3)F center dot H2O family crystallize in the monoclinic system with a space group of P2(1)/c, where the [CuO6](infinity) and [Ln(2)O(12)F(2)](infinity) chains are perpendicular to each other, featuring a three-dimensional framework. Magnetic measurements confirm that all of Ln(2)Cu(SO4)(2)(OH)(3)F center dot H2O family (Ln = Gd, Ho, Yb) exhibit a paramagnetic behavior down to 2 K, where the Weiss temperature theta of near zero, positive, and negative values is observed for Gd, Ho, and Yb-analogues, respectively, due to possibly different 3d-4f spin-orbital couplings.

Automated summary

A series of heterometallic 3d-4f hydroxyl sulfate-fluoride compounds were successfully synthesized via a hydrothermal method, and their magnetic properties at low temperatures were investigated, providing insights into the 3d-4f spin-orbital couplings.