Publication: Photochromic Mechanism and Dual-Phase Formation in Oxygen-Containing Rare-Earth Hydride Thin Films
Дата
2020
Авторы
Hans, M.
Tran, T. T.
Adalsteinsson, S. M.
Moro, M. V.
Moldarev, D.
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Аннотация
© 2020 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimThe phase formation of a photochromic Gd0.31(H0.55O0.45)0.69 thin film, grown by reactive magnetron sputtering, is critically evaluated. Oxygen is preferably incorporated into the underdense columnar grain boundaries, when the as-deposited gadolinium hydride film is exposed to ambient conditions. Two phases, Gd2O3 and GdH2, are formed with significant compressive residual stress of 5.9 ± 1.5 GPa. These findings, extracted from transmission electron microscopy, X-ray diffraction and atom probe tomography, provide a straightforward explanation for the photochromic effect. The mechanism can be understood as photon-induced hydrogen transfer between the two phases, identical in nature to the photochromic effect in bulk yttrium hydride at high pressure.
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Photochromic Mechanism and Dual-Phase Formation in Oxygen-Containing Rare-Earth Hydride Thin Films / Hans, M. [et al.] // Advanced Optical Materials. - 2020. - 10.1002/adom.202000822
URI
https://www.doi.org/10.1002/adom.202000822
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https://www.scopus.com/record/display.uri?eid=2-s2.0-85087646747&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000545780100001
https://openrepository.mephi.ru/handle/123456789/22058