Antiferromagnetic order in DyBa2Cu3O7

Abstract

Neutron diffraction measurements on the high-temperature superconductor Dy${\mathrm{Ba}}_2$ ${\mathrm{Cu}}_3$ ${\mathrm{O}}_7$ have revealed antiferromagnetic ordering of the Dy moments below 1 K. The magnetic unit cell is obtained from doubling the orthorhombic chemical unit cell along all three basis vectors; ${\mathbf{q}}_{\mathrm{magnetic}}$=(½, ½, ½). Within experimental error, the moments are aligned along the $c$ axis of the structure and the ordered moment is $7.2\pm 0.6{\mu }_B$, which is smaller than the full moment of $10{\mu }_B$.