Abstract
The propagation of Nd long range magnetic order in the hexagonal andcubic sublattices has been investigated in double hexagonal compactNd/Sm(001) superlattices by resonant x-ray magnetic scattering at the NdL2 absorption edge. For a superlattice with 3.7 nm thick Sm layers, the magnetic structure ofthe hexagonal sublattice propagates coherently through several bilayers, whereas the orderin the cubic sublattice remains confined to single Nd blocks. For a superlattice with 1.4 nmthick Sm layers, the magnetic structures of both sublattices appear to propagate coherentlythrough the superlattice. This is the first observation (i) of the long range coherentpropagation of Nd order on the cubic sites between Nd blocks and (ii) of a differentthickness dependence of the propagation of the Nd magnetic phases associated with thehexagonal and cubic sublattices. The propagation of the Nd magnetic order through Sm isinterpreted in terms of generalized susceptibility of the Nd conduction electrons.
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