State-specific RKKY interaction in small magnetic clusters
نویسندگان
چکیده
In small binary clusters consisting of a transition metal (TM) of the 3d series and a nonmagnetic element (C, Si, Cu), considerable magnetic moments are induced in the atoms of the nonmagnetic element by the TM. The induced magnetic moments may align ferromagnetically (FM) or antiferromagnetically (AF) with respect to the direction of the magnetic moment of the TM. It is shown that whether the coupling is FM or AF depends not only on the distance of the nonmagnetic atom from the TM but also on the cluster symmetry and the d-band filling of the TM. This behavior is discussed within a state specific generalization of the Ruderman-KittelKasuya-Yosid interaction.
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تاریخ انتشار 2004