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

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.