SOLID-SOLUTIONS TBFE1-XALXO3 0-LESS-THAN-OR-EQUAL-TO-X-LESS-THAN-OR-EQUAL-TO-1) - STRUCTURE AND MAGNETIC-BEHAVIOR

Magnetic X-ray, neutron diffraction and DSC measurements for a solid s olution of the TbFe1-xAlxO3 system have been carried out, The results obtained indicate an essential role for Al substitutions on the magnet ic behaviour of the compounds examined. For low Al concentration, a ra dical reduction of magnetic susceptibility of the compounds has been o bserved. The increase in Al concentration (x = 0.4-0.7) generates a co mpensation temperature (similar to 35 K) in the system, This effect is responsible for the change in the type of Tb-Fe coupling (from ferrom agnetic to antiferromagnetic).