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TT: Fachverband Tiefe Temperaturen
TT 72: Poster Session: Correlated Electrons
TT 72.41: Poster
Wednesday, March 14, 2018, 15:00–19:00, Poster B
Crystal growth in aqueous solution of Cs2CuCl4 and Cs2ZnCl4−xBrx using the evaporation method — •Susanna Rongstock, Nazia Kaya, Franz Ritter, and Cornelius Krellner — Physikalisches Institut, Goethe University Frankfurt, D-60438 Frankfurt
In recent years, Cs2CuCl4 and Cs2CuBr4 have been extensively investigated both experimentally and theoretically, as they represent model systems for quasi-2D triangular-lattice quantum antiferromagnets. They attracted much attention due to their unconventional magnetic properties resulting from the interplay of strong quantum fluctuations in reduced dimensions, geometrical frustration and effects of spin-lattice interactions close to the field-induced quantum critical point (QCP). In triangular antiferromagnetis the heat capacity is a capable measurement technique to study the magnetism. To obtain the magnetic contribution, it is necessary to subtract the phononic contribution, by measuring the heat capacity of Cs2ZnCl4−xBrx. Due to the high number of possible phases different preliminary phases are built during the crystal growth of the Cs2CuCl4-crystal. Hence to develop a solution which creates a preliminary phase free growing of the crystals is of interest. In this contribution we will present the preliminary phase development of the Cs2CuCl4-crystal at 30∘C in dependence to the pH-value and the resulting modification of the solution as well as the heat capacity measurements of the Cs2ZnCl4-crystal. Additionally we will present the crystal growth method and the structural analysis of both systems.