Magnetocrystalline Anisotropy in Fe(5~6 wt%)-Si(3~4 wt%)-Al Alloy Single Crystals

This is the authors' abstract. We don't add key points for this paper.

Temperature dependence of the magnetocrystalline anisotropy constant, K1, and the magnetostriction constants, λ100and λ111, were determined for alloy single crystals containing 4.8 wt% Si, 5.0 wt% Al, bal Fe and 4.7 wt% Si, 3.8 wt% Al, bal Fe. The temperature dependence and magnitude of K1for the two alloys were found to be completely different: K1= 9.1 × 103erg/cm3for the former, and 1.1 × 105erg/cm3for the latter alloy, both at room temperature. The values of λ100and λ111(× 10-6) at room temperature were found to be 4.8 and 9.8 for the former, and 7.8 and 5.7 for the latter alloy. A unique diffraction line, due to the existence of a DO3type ordered structure, was clearly observed for both alloys. From the results obtained, the following were concluded: 1) a discrete change in the values of K1occurs at the phase boundary between the α and the α + DO3phases; 2) the magnitude of K1for the alloy samples consisting of the DO3ordered phase is smaller than that for the &3x003B1; + DO3phase.