The magnetic structures of HoTiO3 and ErTiO3

The magnetic structures of rare-earth titanium perovskites, ErTiO3 and HoTiO3, have been determined at 4.2 K by neutron diffraction. The Er3+ moment of (8.5 ± 0.5) μB lies along [001] and is colinear with the titanium moment of (-0.7 ± 0.3) μB. The Ho3+ moment of (8.1 ± 0.5) μB is inclined at an angle of 24° to the bc plane and 32° to the ab pla so as to produce an antiferromagnetic ordering of the x component and a ferromagnetic ordering of the y and the z components. The titanium moment of (-0.55 ± 0.3) μB lies in the bc plane but its precise direction has not been determined.