Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba2CuTeO6 and Ba2CuWO6: parent phases of a possible spin liquid

Otto Mustonen; Sami Vasala; Heather Mutch; Chris I. Thomas; Gavin B. G. Stenning; Elisa Baggio-Saitovitch; Edmund J. Cussen; Maarit Karppinen

doi:10.1039/C8CC09479A

Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba₂CuTeO₆ and Ba₂CuWO₆: parent phases of a possible spin liquid†

Otto Mustonen,

*^ab Sami Vasala,

^cd Heather Mutch,^b Chris I. Thomas,

^a Gavin B. G. Stenning,^e Elisa Baggio-Saitovitch,^c Edmund J. Cussen^b and Maarit Karppinen

*^a

Author affiliations

* Corresponding authors

^a Department of Chemistry and Materials Science, Aalto University, FI-00076 Espoo, Finland
E-mail: maarit.karppinen@aalto.fi, ohj.mustonen@gmail.com

^b Department of Materials Science and Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK

^c Centro Brasileiro de Pesquisas Físicas (CBPF), Rua Dr Xavier Sigaud 150, Urca, Rio de Janeiro, Brazil

^d Technische Universität Darmstadt, Institut für Materialwissenschaft, Fachgebiet Materialdesign durch Synthese, Alarich-Weiss-Straße 2, 64287 Darmstadt, Germany

^e ISIS Neutron and Muon Source, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, UK

Abstract

The isostructural double perovskites Ba₂CuTeO₆ and Ba₂CuWO₆ 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 Te⁶⁺ and W⁶⁺. A spin-liquid-like ground state is predicted for Ba₂Cu(Te_1−xW_x)O₆ solid solution similar to recent observations in Sr₂Cu(Te_1−xW_x)O₆.

This article is part of the themed collection: Perovskites

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Article information

DOI: https://doi.org/10.1039/C8CC09479A
Article type: Communication
Submitted: 28 Pun 2018
Accepted: 02 Phe 2019
First published: 02 Phe 2019
This article is Open Access

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Chem. Commun., 2019,55, 1132-1135

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Magnetic interactions in the S = 1/2 square-lattice antiferromagnets Ba₂CuTeO₆ and Ba₂CuWO₆: parent phases of a possible spin liquid

O. Mustonen, S. Vasala, H. Mutch, C. I. Thomas, G. B. G. Stenning, E. Baggio-Saitovitch, E. J. Cussen and M. Karppinen, Chem. Commun., 2019, 55, 1132 DOI: 10.1039/C8CC09479A

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Chemical Communications