Magnetic properties of LnTi0.5V0.5O3 (Ln = Ce and Pr)

Magnetic properties of LnTi(0.5)V(0.5)O(3) (Ln Ce and Pr), which are solid solutions between the perovskites LnTiO(3) and LnVO(3), have been investigated. Their crystal structures are an orthorhombic perovskite type (Pnma), where the Ti and V ions are settled with random occupation at the same crystallographic site, DC susceptibility-temperature (X-T) curves exhibit magnetic transitions at T-N similar to 50 K These temperatures are considerably lower than those of the end compounds similar to 116-145 K. The deviation between FC (field-cooled) and ZFC (zero-field-cooled) curves, and the susceptibility cusps only in the ZFC curves are also observed below T-N2 similar to 30 K. Magnetization at 6 K changes almost linearly with logarithm of time. AC susceptibility-temperature (chi(nu)-T) curves show the maximums of both real and imaginary parts of chi(nu). The susceptibility maximum temperatures exhibit temperature dependence. These magnetic properties suggest the formation of spin-glasses, arising from the random occupation of the Ti and V ions. (C) 2001 Academic Press.