Crystal growth and characterization of MnSi∼1.73

摘要: Abstract Boules having a composition which is most silicon-rich among the silicides of manganese MnSi∼1.73 were grown by Bridgman method using starting materials Mn-Si alloys within range between 62.5 to 63.8 at% Si. In this range, three kinds boule could be obtained as follows: The first one had only region crystalline Mn15Si26 with MnSi precipitations, second two regions composed large precipitations and thin polycrystal at upper end, third small lower end. Plate-like always observed in matrix contained 63.2 These distributed parallel c-plane compound, where volume ratio was 0.02. boules are Si-rich compared narrow phases Mn15Si26, Si Si-deficient respect single crystal largest middle portions all boules, however, concentration distribution state corresponding ones boule. amount lattice parameters showed no difference as-grown annealed independent compositions growth rate.