Abstract
Magnetic properties of Ag-Mn-Sb alloys containing 2.49∼69.95%Mn and 4.58∼70.02%Sb have been measured. It has been found that the alloys consisting of about 13∼34%Mn, 23∼42%Sb and 26∼64%Ag show high coercive forces when tempered at 50°∼200°C after chill casting and the alloy consisting of 24.08%Mn, 35.10%Sb and the rest Ag exhibits the highest coercive force, IHC, of 1600 Oe and a residual intensity of magnetization, Ir, of 27 e.m.u. Further it has been determined by means of electron microscopic observation and X-ray analysis that these alloys of high coercivity consist of many fine particles of the ferrimagnetic compound Mn2Sb dispersed in the matrix of the nonmagnetic αAg phase. The high coercivity of these alloys is probably caused by the crystal- and shape-magnetic anisotropy energies in those fine particles of a single magnetic domain.
