Tailoring of magnetism & electron transport of manganate thin films by controlling the Mn-O-Mn bond angles via strain engineering.

ABSTRACT: Strain engineering beyond substrate limitation of colossal magnetoresistant thin (La_0.6Pr_0.4)_0.7Ca_0.3MnO₃ (LPCMO) films on LaAlO₃-buffered SrTiO₃ (LAO/STO) substrates has been demonstrated using metalorganic aerosol deposition technique. By growing partially relaxed 7-27 nm thick heteroepitaxial LAO buffer layers on STO a perfect lattice matching to the LPCMO has been achieved. As a result, strain-free heteroepitaxial 10-20 nm thick LPCMO/LAO/STO films with bulk-like ferromagnetic metallic ground state were obtained. Without buffer the coherently strained thin LPCMO/STO and LPCMO/LAO films were insulating and weakly magnetic. The reason for the optimized magnetotransport in strain-free LPCMO films was found to be

SUBMITTER: Henning P 

PROVIDER: S-EPMC10853165 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature