NEUTRON-DIFFRACTION STUDY OF MAGNETIC-PROPERTIES OF DY Y SUPERLATTICES/

The magnetic properties of MBE-grown Dy/Y superlattices (SLs) have bee n studied by neutron diffraction. The SL growth direction is at an ang le of approximately 35 degrees to the c-axis instead of being along on e of the principal axis directions. The results confirm the coexistenc e of helical antiferromagnetic order and ferromagnetic order up to the Neel temperature T-N approximate to 180 K. This is the first time tha t ferromagnetism has been observed in Dy/Y superlattices. (C) 1998 Pub lished by Elsevier Science B.V. All rights reserved.