NiPSe3 is a quasi-two-dimensional antiferromagnet in the bulk form while it's magnetic response in the monolayer limit remain largely unknown.NiPS3 crystals all crystallize in C2/m space group geometry. These crystals were grown by a vapor transport at our faciltilies to bring defect free vdw crystals. Based on our experience, the amount of vacancy defects plan a vital role is their stability as well as FM response.

　　Perfect crystallization: In our growth process, we pay close attention to creating perfect crystals, each and every crystal is handled and characterized under vacuum or Argon environment.

　　Sample packaging: Samples are purged with Ar gas multiple times, pumped down to 1E-6 Torr pressures to ensure crystals do not interact with the residual gases.

　　Fresh samples: Crystals are always freshly grown and immediately shipped out.

　　Full characterization: Samples are characterized using variety of techniques all under inert gas conditions to confirm the crystalline quality.

　　Properties of NiPS3 crystals