Structure, Magnetism and Colossal Magnetoresistance Behavior in A2Mn2O7 Pyrochlores (A = Dy-Lu, Y, Sc, In or Tl) M.A. Subramanian, J.E. Greedan, N.P. Raju, A.P. Ramirez and A.W. Sleight J. Phys. IV France, 07 C1 (1997) C1-625-C1-628 DOI: 10.1051/jp4:19971258