Analysis of interfacial structure and chemistry in FeV2O4-based heterostructures on (001)-oriented SrTiO3

Electron Microscopy and Analysis Group Conference 2015

Zhou, Y.^1 ; Zhou, D.^1 ; Mitchell, D.R.G.^2 ; Valanoor, N.^1 ; Munroe, P.^1

School of Materials Science and Engineering, University of New South Wales, Sydney

NSW

2052, Australia^1

Electron Microscopy Centre, Australian Institute for Innovative Materials, University of Wollongong, North-Wollongong

NSW

2522, Australia^2

关键词: Buffered substrates;    Energy dispersive X ray spectroscopy;    Epitaxially grown;    High resolution scanning transmission electron microscopies;    Interfacial structures;    Localised;    SrTiO3 substrates;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/644/1/012003/pdf
DOI  :  10.1088/1742-6596/644/1/012003

来源: IOP

【 摘 要 】

In this study, we investigate the interfacial structures and chemistry of FeV2O4(FVO)/ SrTiO3(STO) and FeV2O4/La0.33Sr0.67MnO3/SrTiO3(FVO/LSMO/STO) heterostructures, in which FVO is epitaxially grown on both a (001)-oriented SrTiO3substrate and a LSMO-buffered substrate by pulsed laser deposition (PLD). By combining data from transmission electron microscopy (TEM) imaging together with high-resolution scanning transmission electron microscopy (STEM) imaging, the interfaces between FVO and STO, and FVO and LSMO are found to be coherent and semicoherent, respectively, in spite of more than 8% of strain at the interface. Energy-dispersive X-ray spectroscopy (EDS) analysis suggests that localised diffusion occurs at both the FVO/STO and the FVO/LSMO interfaces.