Bi-Mn Binary Phase Diagram in High Magnetic Fields

To examine magnetic field effects on the Bi-Mn equilibrium phase, a high-magnetic fields differential thermal analysis (HF-DTA) was performed for fields up to 18 T and temperatures ranging from 300 to 753 K. For zero field, the peritectic temperatures Tp(1) (BiMn1.08 + Bi-rich liquid -> BiMn) and T-p2 (alpha Mn + Bi-rich liquid -> BiMn1.08), and the eutectic temperature T-E (the Bi-rich liquid -> Bi solid + BiMn) were determined to be 632, 721 and 538 K, respectively. The Bi-Mn phase diagram at 18 T was obtained, which showed that Tp(1) increases with increasing magnetic fields at the rate of 2 KT-1. Furthermore, the liquidus boundary temperature T-liq between BiMn1.08 + liquid and Bi-rich liquid was found to increase nonlinearly with increasing magnetic field.