Abstract
The magnetizations of the single crystalline binary alloys of Gd with the other heavy rare earth metals, R(=Dy, Ho and Er), were measured at 4.2 K in applied fields up to 54 kOe along the three principal crystallographic directions. The magnetocrystalline anisotropy constants K 0 2 and K 0 4 were determined from the analysis of the hard magnetization curves on the basis of the molecular field theory. The anisotropy constants K 0 2 and K 0 4 were found to vary quadratically with R concentrations. From these results, it is concluded that the magnetic anisotropy of rare earth metals is attributed to the anisotropic exchange interaction as well as the single ion anisotropy.
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