Publication: Comparative analysis of long- and short-range structures features in titanates Ln 2 Ti 2 O 7 and zirconates Ln 2 Zr 2 O 7 (Ln = Gd, Tb, Dy) upon the crystallization process
Дата
2019
Авторы
d'Acapito, F.
Puri, A.
Castro, G. R.
Shchetinin, I. V.
Popov, V. V.
Menushenkov, A. P.
Ivanov, A. A.
Gaynanov, B. R.
Yastrebtsev, A. A.
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Аннотация
© 2019 Elsevier Ltd We report a comparative study of Ln 2 M 2 O 7 (Ln = Gd, Tb, Dy; M = Ti, Zr) synthesized by combination of the sol-gel and coprecipitation methods followed by calcination at elevated temperatures. The long-range average crystal as well as short-range local structure in the samples were analyzed using X-ray diffraction, X-ray absorption spectroscopy (XAFS) and Raman spectroscopy. It has been found that Ln-Ti precursors crystallize directly to pyrochlore phase, whereas crystallization of Ln-Zr precursors to pyrochlore phase goes through intermediate fluorite phase. We have shown that X-ray absorption data make possible to detect the crystallization and phase transition features in Ln 2 M 2 O 7 such as splitting of Ln-O coordination shells and changes of the symmetry in local environment.
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Comparative analysis of long- and short-range structures features in titanates Ln 2 Ti 2 O 7 and zirconates Ln 2 Zr 2 O 7 (Ln = Gd, Tb, Dy) upon the crystallization process / d'Acapito, F. [et al.] // Journal of Physics and Chemistry of Solids. - 2019. - 130. - P. 144-153. - 10.1016/j.jpcs.2019.02.019
URI
https://www.doi.org/10.1016/j.jpcs.2019.02.019
https://www.scopus.com/record/display.uri?eid=2-s2.0-85062291700&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000467669100018
https://openrepository.mephi.ru/handle/123456789/16611
https://www.scopus.com/record/display.uri?eid=2-s2.0-85062291700&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000467669100018
https://openrepository.mephi.ru/handle/123456789/16611