Cation non-stoichiometry in Fe:SrTiO₃ thin films and its effect on the electrical conductivity.

ABSTRACT: The interplay of structure, composition and electrical conductivity was investigated for Fe-doped SrTiO₃ thin films prepared by pulsed laser deposition. Structural information was obtained by reciprocal space mapping while solution-based inductively-coupled plasma optical emission spectroscopy and positron annihilation lifetime spectroscopy were employed to reveal the cation composition and the predominant point defects of the thin films, respectively. A severe cation non-stoichiometry with Sr vacancies was found in films deposited from stoichiometric targets. The across plane electrical conductivity of such epitaxial films was studied in the temperature range of 250-720 °C by impedance spectroscopy. This revealed a pseudo-intrinsic electronic conductivity despite the substantia

SUBMITTER: Morgenbesser M 

PROVIDER: S-EPMC8548878 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature