Neutron diffraction and magnetic susceptibility experiments were performed
on single crystals of the doped Mott-Hubbard insulator LaTiO3+delta. The ma
gnetic properties of the three-dimensional correlated electron system were
investigated upon hole doping. The size of the ordered moment of Ti3+ in th
e canted antiferromagnetically ordered phase reaches a maximum of 0.46(2) m
u(B) for LaTiO3. Upon increasing the band filling, i.e., upon increasing th
e amount of nonstoichiometric oxygen delta from 0 to similar to 0.08, the o
rdered moment on Ti3+ is shown to decrease rapidly. The weak-ferromagnetic
saturation moment of LaTiO3.07(1), on the verge of the insulator-to-metal t
ransition, is reached via a series of steps in the magnetization curve. [S0
163-1829(99)00318-5].