ANISOTROPIC SUPERCONDUCTING-STATE THERMODYNAMIC PARAMETERS OF THE ELECTRON-DOPED COMPOUND SM1.85CE0.15CUO4-Y

The anisotropic superconducting-state thermodynamic parameters of the electron-doped compound Sm1.85Ce0.15CuO4-y have been derived from reversible dc magnetization M(H,T) measurements on magnetically aligned single-crystal particles of the compound for magnetic fields applied perpendicular and parallel to the ab plane. A recent model developed by Hao et al., which describes M(H,T) over the entire field region between H(c1) and H(c2), was used to analyze the M(H,T) data. The analysis of the measurements provides a self-consistent test of the model and resolves a controversy by showing that the anisotropy of H(c2)(T) of the electron-doped compound Sm1.85Ce0.15CuO4-y is comparable to that of the hole-doped compound YBa2Cu3O7-delta.