Epitaxy and controlled oxidation of chromium ultrathin films on ferroelectric BaTiO3 templates

Marco Asa,Christian Rinaldi,Luca Nessi,Daniel Chrastina,Daniela Petti,Edoardo Albisetti,Riccardo Bertacco,Matteo Cantoni

Journal of Crystal Growth（2021）

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摘要

•Chromium films grown by MBE on BaTiO3/Nb:SrTiO3 are epitaxial up to 2 nm.•Insulating Cr2O3 is obtained from Cr by activated migration of oxygen from BaTiO3.•Crystalline Cr and Cr2O3 phases can coexist on BaTiO3/Nb:SrTiO3 templates.•Nb doping of SrTiO3 substrates stabilizes a crystalline Cr film on a BaTiO3 layer.

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关键词

A1. Crystal structure,A1. Low dimensional structures,A2. Single crystal growth,A3. Molecular beam epitaxy,B1. Oxides,B1. Metals

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