Magnetic domain structure in a hyperfine-enhanced nuclear magnet PrCu6

Magnetization curve measurement in the spin-ordered state of an enhanced nu clear magnet PrCu6 has been carried out. Hysteresis due to a ferromagnetic domain structure is observed. The hysteresis appears when the magnetic fiel d is applied along the c-axis, but not along the b-axis. This strongly anis otropic behavior suggests that a possible spin structure in the ordered sta te is a canted ferromagnet: ferromagnetically aligned along the c-axis with magnetic domains but antiferromagnetically along b-axis. (C) 2000 Elsevier Science B.V. All rights reserved.