Concentration and temperature dependences of magnetic moment values and magnetocrystallic anisotropy constant of quasibinary intermetallic compounds of Er2(Co1–xMx)17 type, where M = Fe, Ni, are studied. It is shown that it is possible to change the magnetic anisotropy value of compounds of rare earth metals with 3d‐metals (T) and its temperature dependence by means of replacing one 3d‐ion by another in definite crystallographic lattice sites and changing the energy of intersublattice exchange interaction.

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The processes of magnetization reversal in isotropic and anisotropic commercial permanent magnets Sm(Co, Fe, Cu, Zr)7.5 were investigated. Features of magnetization reversal process in both textured and isotropic magnets were analyzed with δM(H) plots, magnetic susceptibility and initial magnetization curves. The magnetization reversal of Sm(Co, Fe, Cu, Zr)7.5 magnets is more complicated than that described in the coercivity model based on the domain walls pinning.