We report the first use of parameter-free norm-conserving pseudopotentials for a strongly spin-polarized material, ferromagnetic bcc iron. Ground-state properties such as the equilibrium lattice constant, magnetic moment, and bulk modulus are calculated within the local-density-functional approximation and agree within a few percent with experiments. The deviations are, however, significantly larger than what is typically found for materials with s,p electrons.
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Greenside et al. (1983) studied this question.
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