Growth and magnetic properties of MnCl2–4SC(NH2)2 single crystals

•MnCl2–4SC(NH2)2 single crystals are grown by using by the slow evaporation method.•The growth conditions are optimized.•Structural and magnetic properties are characterized.•No magnetic exchange interactions are observed down to 0.4 K.

NiCl2–4SC(NH2)2 (DTN) is a famous one-dimensional antiferromagnet with magnon Bose–Einstein condensation. In this work, single crystals of MnCl2–4SC(NH2)2 (DTM) with size up to (8–10)×(8–10)×(3–5) mm3 are grown by using the slow evaporation method with optimized conditions. The single crystals are characterized by measurements of X-ray diffraction, magnetic susceptibility, and specific heat. It is found that although DTM has a similar crystal structure to DTN, it shows a paramagnetic behavior. The reason for no spin exchange among Mn2+ ions can be understood in terms of the negligible overlap of the Mn2+-3d orbital and the neighboring Cl−-3p orbital.