Spin-orientation diagram of the pseudobinaryTb1−xDyxFe2Laves compounds

The spin-orientation diagram of ${\mathrm{Tb}}_{1-x}{\mathrm{Dy}}_x{\mathrm{Fe}}_2$ is constructed by ${}_{}{}^{57}{}_{}{}^{}\mathrm{Fe}$ Mössbauer measurements and compared with single-ion calculations. The $4f$-crystal-field interaction dominates the magnetocrystalline anisotropy properties, though the presence of additional contributions to the magnetic anisotropy free energy is indicated.