Structural investigation of epitaxial LaFeO3 thin films on (111) oriented SrTiO3 by transmission electron microscopy

Electron Microscopy and Analysis Group Conference 2015

Christiansen, E.^1 ; Nord, M.^1 ; Hallsteinsen, I.^2 ; Vullum, P.E.^1,3 ; Tybell, T.^2 ; Holmestad, R.^1

Department of Physics, Norwegian University of Science and Technology (NTNU), Trondheim

7491, Norway^1

Department of Electronics and Telecommunications, Norwegian University of Science and Technology (NTNU), Trondheim

7491, Norway^2

SINTEF, Materials and Chemistry, Trondheim

7465, Norway^3

关键词: Bragg scattering;    Dark field imaging;    Domain orientation;    Epitaxial thin films;    Irregular shape;    Orthorhombic structures;    Structural domains;    Structural investigation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/644/1/012002/pdf
DOI  :  10.1088/1742-6596/644/1/012002

来源: IOP

【 摘 要 】

We report on structural domains in LaFeO3epitaxial thin films on (111) oriented SrTiO3observed by transmission electron microscopy using low magnification dark field imaging and high resolution transmission electron microscopy techniques. The films were grown by pulsed laser deposition and had a thickness ≈ 20 nm. Three domain orientations are found, in accordance with the orthorhombic structure of LaFeO3. The domains themselves are of irregular shapes, and vary in size from tens to thousands of nm2. Regions of reduced Bragg scattering are observed as straight lines along , hinting at a complex domain structure.