Tetragonal Mixed System Cs₂CuCl₄₋ₓBrₓ Complemented by the Tetragonal Phase Realization of Cs₂CuCl₄

Titelangaben

van Well, Natalija ; Eisele, Claudio ; Ramakrishnan, Sitaram ; Shang, Tian ; Medarde, Marisa ; Cervellino, Antonio ; Skoulatos, Markos ; Georgii, Robert ; van Smaalen, Sander:
Tetragonal Mixed System Cs₂CuCl₄₋ₓBrₓ Complemented by the Tetragonal Phase Realization of Cs₂CuCl₄.
In: Crystal Growth & Design. Bd. 19 (2019) Heft 11 . - S. 6627-6635.
ISSN 1528-7505
DOI: https://doi.org/10.1021/acs.cgd.9b01035

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Abstract

Realization of the tetragonal phase of Cs2CuCl4 is possible using specific crystal growth conditions at a temperature below 281 K. This work deals with the comparison of the magnetic susceptibility and the magnetization of this new tetragonal compound with the magnetic behavior of tetragonal Cs2CuCl2.9Br1.1, Cs2CuCl2.5Br1.5, and Cs2CuCl2.2Br1.8 and presents consistent results for such quasi 2-D antiferromagnets. Structural investigation at low temperature for Cs2CuCl2.2Br1.8 shows no phase transition. The structure remains in the tetragonal symmetry I4/mmm. Furthermore, several magnetic reflections corresponding to the propagation vector k = (0, 0, 0) are observed for this tetragonal compound through neutron diffraction experiments below the magnetic phase transition at TN = 11.3 K confirming its antiferromagnetic nature.Realization of the tetragonal phase of Cs2CuCl4 is possible using specific crystal growth conditions at a temperature below 281 K. This work deals with the comparison of the magnetic susceptibility and the magnetization of this new tetragonal compound with the magnetic behavior of tetragonal Cs2CuCl2.9Br1.1, Cs2CuCl2.5Br1.5, and Cs2CuCl2.2Br1.8 and presents consistent results for such quasi 2-D antiferromagnets. Structural investigation at low temperature for Cs2CuCl2.2Br1.8 shows no phase transition. The structure remains in the tetragonal symmetry I4/mmm. Furthermore, several magnetic reflections corresponding to the propagation vector k = (0, 0, 0) are observed for this tetragonal compound through neutron diffraction experiments below the magnetic phase transition at TN = 11.3 K confirming its antiferromagnetic nature.