SDW state for Cr metal and dilute Cr-V and Cr-Mn alloys

Abstract

The approximate d bands for Cr metal in antiferromagnetic SDW state are formulated in the tight binding approximation. It is shown that the antiferromagnetic SDW state with the periodicity extending to 21 times the lattice constant has the minimum electronic energy by using these energy bands. The d bands for Cr metal in SDW state including the spin-orbit interaction are also formulated, and stable spin configuration is investigated by comparing the free energy calculated by these energy bands. It is found that the longitudinal SDW state is stable in low temperatures, and spin flip takes place between 100 and 150 K near 4.428 d electrons per atom. Some inspection is done about the various magnetic states for dilute Cr-V and Cr-Mn alloys, and good explanation is obtained for the experimental results.