A neutron diffraction study of the magnetic properties of PrTiO3 and NdTiO3

The magnetic properties of PrTiO3 and NdTiO3 were studied by neutron diffraction at several temperatures below 110 K. Although PrTiO3 exhibits a TN at 90 K no significant magnetic scattering was detected down to 65 K. The order at 90 K can be attributed to the Ti(III) below our detection limit of 0.25μB. Below 65 K magnetic reflections due to the Pr(III) sublattice develop consistent with a FxCy configuration. At 7 K the moment is 1.35(15)μ[inB] and lies at 45° (5) to the a or b axes. This structure is contrasted with that found for PrCrO3. By comparing powder data at 50 and 7 K for NdTiO3 it is concluded there is no evidence for magnetic order on either the Nd(III) or Ti(III) sublattices in agreement with bulk magnetic properties. The decrease in magnitude of the Ti(III) moment from LaTiO3 to NdTiO3 is compared to the known behavior of the La1-xYxTiO3 system and is found to be consistent.