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

TL;DR

This study investigates the structural and electronic characteristics of epitaxial YBaCuO/LaCaMnO bilayers grown on SrTiO3 substrates, revealing anisotropic properties and modest reductions in critical temperatures and magnetization.

Contribution

It presents a detailed analysis of epitaxial YBCO/LCMO bilayers with complete (110) orientation, highlighting their anisotropic electronic and magnetic properties and comparing them to bulk materials.

Findings

YBCO/LCMO bilayers are fully oriented along (110) planes.

The bilayers exhibit highly anisotropic resistivity and magnetization.

Critical temperatures and saturation magnetization are slightly reduced from bulk values.

Abstract

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