Magnetic susceptibility study of the heavy rare-earth stannate pyrochlores

The series of magnetic rare earth pyrochlore stannates R 2 Sn 2 O 7 (R = rare earth, except Ce and Pm) have been investigated by powder susceptibility measurements down to T = 1.8 K.The results are compared to 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.