Nominal kagome antiferromagnetic Mn3Sn: effects of excess Mn and its novel synthesis method

The magnetic structure of Mn 3 Sn depends on the Mn content. We grew more stoichiometric Mn 3+ x Sn 1− x ( x = 0.01) single crystals using Bi flux and observed the sharpest magnetic phase transition along with the emergence of multi-k helical spin orderings.