Magnetic Properties of $DO_{3}$-Type Alloys Based on $Fe_{3}Si$ and $Fe_{3}Al$

The interest in magnetic properties of $DO_{3}$-type alloys stems from their ability to exhibit dependence of magnetic moments on local environment. It is shown that both, static and dynamic properties of the alloys based on $Fe_{3}Si$ and $Fe_{3}Al$ require further investigations. This concerns mainly the problem of selective substitution of chromium for iron, as well as spin dynamics, the latter problem is illustrated on the example of measured spin waves in Sendust.