Abstract
Our recent theoretical studies are summarized. The magnetovolume effect in Fe and Ni is discussed and the effects on the volume striction of spin fluctuations are estimated in the paramagnetic state of Fe, Ni, Cr and ZrZn 2. The pressure dependence of the Curie temperature and first-order transition temperature and forced magnetostriction are calculated in a combined model of localized spins and itinerant d-electrons and the observed results for dilute Pd and Pt alloys with Fe, Co and Ni atoms and rare earth-Co 2 compounds are explained. Anisotropic magnetoelastic coupling constants in Fe and deformations of energy levels, Fermi surfaces and density of states due to shear strains in V are calculated in a tight-binding parametrisation scheme. A topological change of the Fermi surfaces due to shear strains is obtained in V. The electronic contribution to elastic shear constants is also calculated. The electronic Grüneisen constant is calculated for Nb and a comparison with experiment is carried out.
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