ИСТИНА

This paper is devoted to structural and magnetic properties of several families of complex pnictides formed by divalent europium together with d-metals. They range from clathrates and related compounds to cluster compounds of transition metals. Within each family, the interaction of seemingly localized 4f7 electrons through an appropriate itinerant system evokes spin ordering rendering ferromagnetic or antiferromagnetic ground state depending on the details of the crystal structure. The relationships of their crystal and electronic structure and magnetic properties will be discussed in this paper.