Magnetic structure of heavy-fermion Ce2RhIn8 - art. no. 020401

The magnetic structure of the heavy-fermion antiferromagnet Ce2RhIn8 is det ermined using neutron diffraction. It is a collinear antiferromagnet with a magnetic wave vector (1/2,1/2,0) and a staggered moment of 0.55(6)mu (B) p er Ce at 1.6 K, tilted 38(2)degrees from the tetragonal c axis. In spite of its layered crystal structure, the phases for the magnetic moments are the same as those in the cubic parent antiferromagnet CeIn3. This suggests tha t the cubic CeIn3 building blocks have a stronger influence on magnetic cor relations than intervening RhIn2 layers, which give the material its appare nt two-dimensional lattice structure and renders CeRhIn5 an incommensurate antiferromagnet.