Data for Paper "Critical phenomenon and phase diagram of Mn-intercalated layered MnNb3S6"

Single-crystals of MnNb3S6 were grown by the chemical vapor transport method using iodine as the transport agent. The sample preparation method was described in detail elsewhere. The chemical compositions of the single crystal were carefully determined by the energy dispersive x-ray (EDX) spectrometry. The crystal structure and orientation were checked by x-ray diffraction (XRD) using high-intensity graphite monochromatized Cu Kα radiation. The magnetization was measured using a quantum design vibrating sample magnetometer (SQUID-VSM). To ensure a precise magnetic field and data, the magnetic field was applied with no-overshoot mode, and relaxed for 2min before data collection. In particular, when measuring the initial isothermal magnetization, the sample was cooled to the target temperature under zero magnetic field after heated adequately above TC for 10min.