An Analysis of the Magnetic Properties of CrMnFeCoNi

High-entropy alloys are comprised of 5 or more elements in equal proportions, resulting in a large configurational entropy. These alloys' unique composition gives rise to properties not observable in conventional materials. While many of these alloys are known to be magnetic, their magnetic properties have not been studied in detail. CrMnFeCoNi, or Cantor's alloy, is one of the most well known high-entropy alloys. We used muon spin relaxation, a highly sensitive probe of magnetism, to examine the magnetism of various samples of Cantor's alloy, including samples undergoing different treatments in formation and samples with nonequiatomic stoichiometry. The magnetic transition temperature and character of the transition are found to be highly sensitive to the preparation methods and atomic ratios. We also observe significant differences in the spin dynamics depending on the composition. These results set the stage for investigating applications of the magnetic properties of high entropy materials.