Transition-metal redistribution in GdBa2Cu3−xMxO7−δ and YBa2Cu3−xMxO7−δ (M=Fe, Co, and Ni): Evidence for Gd-Fe(2) magnetic interactionsRemoveT. R. S. Prasanna, R. Chatterjee, R. C. O’Handley, and G. KalonjiPhys. Rev. B 46, 448 (1992)
