Abstract
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.
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