Structural and electronic properties of epitaxial YBaCuO/LaCaMnO bilayers grown on SrTiO$_3$ (110) substrates

摘要

Epitaxial bilayers of the high-temperature-superconductor YBa2Cu3O7-d (YBCO)and the ferromagnetic metal La0.67Ca0.33MnO3 (LCMO) were prepared by pulsedlaser deposition on (110)-oriented SrTiO3 substrates, such that the CuO2 planesof YBCO are perpendicular to the YBCO-LCMO interface. X-ray diffraction andRaman scattering demonstrate complete (110) orientation of both YBCO and LCMOoverlayers. The resistivity and magnetization of the bilayer films are highlyanisotropic. The critical temperatures for superconductivity and ferromagnetismas well as the saturation magnetization exhibit modest reductions compared tocorresponding bulk values.