Dzyaloshinsky-Moriya interaction in the enhanced nuclear magnet PrCu6 - art. no. 014415

Recently it has been shown experimentally that the enhanced nuclear magnet PrCu6 behaves antiferromagnetically along the b axis and ferromagnetically along the c axis. The mechanism for this anomalous magnetism is proposed he re. The key lies in the crystal structure of PrCu6 with space group P2(1)/( c). In the unit cell there are two kinds of sites for Pr atoms. The neighbo ring atoms of one Pr are located at mirror reflection of those for another Pr. It is shown that between nuclear spins of these two Pr atoms the Dzyalo shinsky-Moriya type interaction is induced in the Ruderman-Kittel-Kasuya-Yo sida interaction through the Van Vleck susceptibility. The susceptibility i s calculated in the mean-field approximation, which reproduces the features of experimental results qualitatively.