TY - JOUR
T1 - Anion arrangement analysis of oxynitride perovskite thin film with inverse photoelectron holography
AU - Yamamoto, Y.
AU - Ang, A. K.R.
AU - Kimura, K.
AU - Matsushita, T.
AU - Hirose, Y.
AU - Oka, D.
AU - Hayashi, K.
N1 - Funding Information:
This work was supported by the Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for Scientific Research No. 16H03849 and No. 16H06441 and Grant-in-Aid for Scientific Research on Innovative Areas “3D Active-Site Science” No. 26105006 and the JSPS Japanese–German Graduate Externship.
Publisher Copyright:
© 2020
PY - 2021/1
Y1 - 2021/1
N2 - Oxynitride perovskites are an emerging class of materials that have intriguing electrical and optical properties that can be used for a wide variety of novel applications. The arrangement of the anions significantly drives these properties, but it is difficult to assess the anion arrangements in thin film samples. Inverse photoelectron holography is an atomic resolution holography technique that can directly measure the local structure around atoms of light elements in a sample. The holograms of the anions in SrTaO2N thin films were obtained and a remarkable difference was found between the O and N holograms. Analysis of the holographic features and simulations suggests that the sample consists of trans-type anion ordering. A new structural model consisting of trans-type structures where the N anions are aligned in different directions was proposed, and the resulting simulated hologram agrees well with the experiment.
AB - Oxynitride perovskites are an emerging class of materials that have intriguing electrical and optical properties that can be used for a wide variety of novel applications. The arrangement of the anions significantly drives these properties, but it is difficult to assess the anion arrangements in thin film samples. Inverse photoelectron holography is an atomic resolution holography technique that can directly measure the local structure around atoms of light elements in a sample. The holograms of the anions in SrTaO2N thin films were obtained and a remarkable difference was found between the O and N holograms. Analysis of the holographic features and simulations suggests that the sample consists of trans-type anion ordering. A new structural model consisting of trans-type structures where the N anions are aligned in different directions was proposed, and the resulting simulated hologram agrees well with the experiment.
KW - Ferroelectricity
KW - Inverse photoelectron holography
KW - Oxyniteride
KW - Scanning electron microscopy
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U2 - 10.1016/j.elspec.2020.147018
DO - 10.1016/j.elspec.2020.147018
M3 - Article
AN - SCOPUS:85098451599
VL - 246
JO - Journal of Electron Spectroscopy and Related Phenomena
JF - Journal of Electron Spectroscopy and Related Phenomena
SN - 0368-2048
M1 - 147018
ER -