Elastic calculation of self-migration energy in hcp metals

Vacancy migration energies $E_{1V}^{\mathrm{mig}}$ in hcp metals are calculated in the framework of a model used before for the treatment of self-migration energies in fcc and bcc metals. The monovacancy mechanism is supposed to be the only mechanism controlling self-diffusion in normal hcp metals. As a result of the crystal-lattice anisotropy, the trial displacement functions have to be chosen in an explicit anisotropic form. The basic assumptions of the model are discussed. The calculated self-diffusion migration energies are in good agreement with the available experimental data.