Single crystal growth of antiferromagnetic Mn3Si by a two-phase RF floating-zone method

► Single crystals of Heusler Mn3Si were grown using magnetic field controlled RF-floating-zone. ► Magnetic phase transition at about 23 K was confirmed by specific heat measurements. ► Permanent magnetic moments are detected even above the ordering temperature of the majority phase. ► A probable small residual amount of impurity phase (Mn5Si2) may cause ferromagnetic contribution. ► Otherwise, it can possibly be related to a spin glass magnetic order (not to majority Mn3Si phase).