Magnetic properties of the MnBi intermetallic compound

作者：Yang JB^*; Kamaraju K; Yelon WB; James WJ; Cai Q; Bollero A

来源：Applied Physics Letters, 2001, 79(12): 1846-1848.

DOI：10.1063/1.1405434

A MnBi alloy containing over 90 wt % low-temperature phase (LTP) has been obtained by high-temperature sintering and magnetic purification. The coercivity of the bonded MnBi magnet increases with increasing temperatures. A coercivity of 2.0 T has been achieved at 400 K. The maximum energy product (BH)(max) of the magnet is 7.7 MGOe (61 kJ/m(3)) and 4.6 MGOe (37 kJ/m(3)) at room temperature. and 400 K, respectively. Neutron diffraction and magnetic data reveal a spin reorientation, which gives rise to low anisotropy fields and coercivity at lower temperatures for the LTP MnBi alloy.

• 出版日期2001-9-17