Magnetic susceptibility study of the heavy rare-earth stannate pyrochlores

The series of magnetic rare-earth pyrochlore stannates R2Sn2O7 (R=rare earth, except Ce and Pm) have been investigated by powder susceptibility measurements down to T=1.8 K. The results are compared with results for the analogous titanate series, which are well known frustrated magnets. Unlike the titanates, the whole series can be formed in the cubic pyrochlore structure. Possible experimental advantages of studying the stannates are discussed.