Magnetic Properties of Ce1−xNdxTiO3and Some Solid Solution Orthotitanates Ln1−xLn′xTiO3(Lnand Ln′=La to Sm; 0≤x≤1)

Magnetic properties of the solid solution orthotitanate Ce1−xNdxTiO3have been studied, where the characteristic susceptibility peaks are found in their susceptibility–temperature (χ–T) curves as in La1−xSmxTiO3and Pr1−xNdxTiO3. The common features of this phenomenon are the pronounced magnetic hysteresis at TP(susceptibility peak temperature), and its significant diminishment above and below TP. The properties for some other solid solutions such as Ce1−xSmxTiO3were also investigated. Though susceptibility peaks were found for a few of these systems, they were quite vague compared with those for the above three systems. From DC magnetization–relaxation and AC susceptibility measurements, the formation of a cluster-glass state is assumed to be a possible origin of the susceptibility peak in Ce1−xNdxTiO3, as was suggested also for La1−xSmxTiO3. Powder neutron diffraction measurements for Ce0.5Nd0.5TiO3revealed that neither long-range magnetic order nor structural changes exist below room temperature. The above interpretation supports this result.