Data for Paper "3D-Heisenberg magnetic coupling in the skyrmion system Fe1.5-xCoxRh0.5Mo3N (x=0.5, 1.0, 1.2)"

The detailed sample preparation method and physical properties were described and checked elsewhere. The magnetization was measured using a Quantum Design Vibrating Sample Magnetometer (SQUID-VSM).

The no-overshoot mode was applied to ensure a precise magnetic field. The magnetic field was relaxed for two minutes before data collection. For the measurement of initial isothermal magnetization, the sample was firstly heated adequately above the Curie temperature TC for ten minutes, then cooled to the target temperature under zero magnetic field.