The Specific Heat of YBa2Cu3O7
Norman E. Phillips；R. A. Fisher；J. E. Gordon
Chinese Journal of Physics
|Volume or Term/Year and Month of Publication||
30卷6期（1992 / 12 / 01）
799 - 807
We review the experimental evidence suggests that substantial fractions of typical YBa2Cu307 samples are non-superconducting; that the non-superconducting inclusions are of dimensions of a lattice parameter; that the non-superconducting inclusions are associated with Cu^2+ magnetic moments; and that the linear term in the specific heat is not an ”intrinsic” property but is associated with the presence of these Cu^2+ magnetic moments and impurity phases. A preliminary result on the effect of heat treatment on the volume fraction of superconductivity is also presented.