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Title
Japanese: 
English:Highly oriented epitaxial CaFe2O4 thin films on TiO2 substrates grown by pulsed-laser deposition 
Author
Japanese: 西山奈菜, 増子尚徳, 吉松 公平, 堀場弘司, 組頭 広志, 大友 明.  
English: Nana Nishiyama, Hisanori Mashiko, K. Yoshimatsu, Koji Horiba, Hiroshi Kumigashira, A. Ohtomo.  
Language English 
Journal/Book name
Japanese: 
English:Thin Solid Films 
Volume, Number, Page Vol. 638        pp. 406-409
Published date Sept. 30, 2017 
Publisher
Japanese: 
English:Elsevier 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Official URL http://www.sciencedirect.com/science/article/pii/S0040609017305837?via%3Dihub
 
DOI https://doi.org/10.1016/j.tsf.2017.08.003
Abstract CaFe2O4 (CFO) is an oxide semiconductor being usable for a photocathode, but its single crystal is so far grown only by a high-pressure bulk synthesis method. Using pulsed-laser deposition, we have obtained the (010)-oriented CFO films on TiO2 (100) substrates. The epitaxial structure included twin domains with 1.5° tilting fromthe surface normal and sixfold domainswith in-plane rotations of±70° with respect to the b axis of TiO2,whichwas explained by taking a number of probable arrangements between FeO6 and TiO6 octahedra into account. X-ray absorption spectroscopy and ultra-violet-visible-near-infrared spectroscopy measurements revealed the electronic properties similar to those of bulk and thus the CFO films would be suitable to the investigation of photocathodic performance.

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