Bi-Mn Binary Phase Diagram in High Magnetic Fields

摘要

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 T_(p1) (BiMn_(1.08) + Bi-rich liquid → BiMn) and T_(p2) (oMn + Bi-rich liquid → BiMn_(1.08)), and the eutectic temperature T_E (the Bi-rich liquid -s- Bi solid + BiMn) were determined to be 632, 721 and 538K, respectively. The Bi-Mn phase diagram at 18T was obtained, which showed that T_(p1) increases with increasing magnetic fields at the rate of 2KT~(-1). Furthermore, the liquidus boundary temperature T_(liq) between BiMn_(1.08) + liquid and Bi-rich liquid was found to increase nonlinearly with increasing magnetic field.