Exchange Inversion in Ternary Modifications of Iron Rhodium

Abstract

The effect of various transition metal modifiers on the magnetic properties of iron‐rhodium alloys was studied. The exchange inversion temperature T_s, residual magnetization, and maximum magnetization are dependent on the nature of the modifier and on the degree of substitution. As little as 2 at. % of Co, Ni, Cu, Nb, Mo, Ta, or W eliminates the exchange inversion transition, while addition of Ru, Os, Ir, or Pt increases T_s over that for the comparable binary alloy, and addition of Pd, V, Mn, or Au decreases T_s. For the series of alloys FeRhIr_x, T_s increases as x increases from 0−0.25; for the series FeRhPd_x, T_s decreases as x increases. The range of composition over which exchange inversion is observed is quite narrow.