T.R. McGuire, T.S. Plaskett, et al.
IEEE Transactions on Magnetics
A single-crystal of YBa2Cu2.85Fe0.15O 7 was found to be tetragonal over the temperature range 10-300 K. The iron obeyed a Curie-Weiss law attributed to divalent Fe and showed a negative intercept indicating antiferromagnetic exchange. The presence of Fe degraded the superconducting properties such that critical currents are only 10%-20% of that in the best pure YBa2Cu3O7-δ crystals without Fe and the superconducting transition temperature has decreased from 90 to 60 K.
T.R. McGuire, T.S. Plaskett, et al.
IEEE Transactions on Magnetics
R.J. Gambino, T.R. McGuire
Journal of Magnetism and Magnetic Materials
P.A. Roland, S.J. La Placa, et al.
MRS Proceedings 1992
M.W. Shafer, T.R. McGuire
Physics Letters A