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Magnetic interactions in the <i>S</i> = 1/2 square-lattice antiferromagnets Ba<sub>2</sub>CuTeO<sub>6</sub> and Ba<sub>2</sub>CuWO<sub>6</sub>: parent phases of a possible spin liquid

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21

Citations

8

References

2019

Year

Otto Mustonen, Sami Vasala, Heather M. Mutch, Christopher I. Thomas, Gavin B. G. Stenning, E. Baggio‐Saitovitch, Edmund J. Cussen, Maarit Karppinen
Chemical Communications

Abstract

The isostructural double perovskites Ba<sub>2</sub>CuTeO<sub>6</sub> and Ba<sub>2</sub>CuWO<sub>6</sub> are shown by theory and experiment to be frustrated square-lattice antiferromagnets with opposing dominant magnetic interactions. This is driven by differences in orbital hybridisation of Te<sup>6+</sup> and W<sup>6+</sup>. A spin-liquid-like ground state is predicted for Ba<sub>2</sub>Cu(Te<sub>1-x</sub>W<sub>x</sub>)O<sub>6</sub> solid solution similar to recent observations in Sr<sub>2</sub>Cu(Te<sub>1-x</sub>W<sub>x</sub>)O<sub>6</sub>.

References

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