Electrical resistivities were measured as a function of temperature in the range below 300 K for single-crystal samples of PrTiO3and NdTiO3. Both materials are semiconductors with room temperature activation energies of 0.03 to 0.04 eV. Magnetic susceptibilities for PrTiO3and NdTiO3follow the Curie-Weiss law at high temperatures with Cm= 1.73(3) and Θc= -49(3) K (PrTiO3), and Cm= 1.77(3), Θc= -35(3) K (NdTiO3). For PrScO3and NdScO3, isostructural materials, magnetic-susceptibility data also follow the Curie-Weiss law with Cm= 1.34(3) and Θc= -8(2) K (PrScO3) and Cm= 1.51(3) and Θc= -32(3) K (NdScO3). Assuming that the data for PrScO3and NdScO3represent a fair approximation to the rare-earth-only susceptibility, a Ti(III) contribution to the susceptibilities of PrTiO3and NdTiO3can be estimated and these are found to be near the spin-only value. PrTiO3shows complex magnetic order below 96(2) K, while NdTiO3shows no obvious sign of order above 4.2 K. © 1981.
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