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Magnetic structures of R3Cu4Sn4 (R = Pr and Nd)

Polycrystalline samples of R3Cu4Sn4 (R = Pr and Nd) intermetallics were studied with neutron diffraction methods. Both of them crystallize in the orthorhombic structure of Gd3Cu4Ge4-type. Pr3Cu4Sn4 orders antiferromagnetically below the Néel temperature of about 11 K whereas Nd3Cu4Sn4 does not order magnetically down to 1.5 K. In Pr3Cu4Sn4 the magnetic moments are localized at the Pr atoms that occupy two non-equivalent 2d and 4e sublattices and order simultaneously at the Néel temperature forming a collinear magnetic order along the x-direction.