Publication: Local Disorder in Ln2Ti2O7 (Ln = Gd, Tb, Dy) Pyrochlores
Дата
2019
Авторы
d'Acapito, F.
Puri, A.
Menushenkov, A. P.
Popov, V. V.
Gaynanov, B. R.
Ivanov, A. A.
Kuznetsov, A. V.
Yaroslavtsev, A. A.
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Аннотация
© 2019, Pleiades Publishing, Inc.The temperature dependences of extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) spectra of Ln2Ti2O7 (Ln = Gd, Tb, Dy) geometrically frustrated magnets with a pyrochlore structure are presented. The temperature dependences of the Ln-O and Ti-O interatomic bond lengths and Debye-Waller factors σ2 characterizing the local static and dynamic disordering of bonds have been obtained in the temperature range of 10–300 K. The stiffnesses of metal-oxygen bonds and the parameters of local disordering of the structure have been determined from the dependences σ2(T). The effect of the magnetic state of rare-earth ions on local features of the Ln2Ti2O7 structure has been described. The characteristics of local disorder in pyrochlores under study have been compared to dysprosium zirconate Dy2Zr2O7 having a disordered fluorite structure.
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Local Disorder in Ln2Ti2O7 (Ln = Gd, Tb, Dy) Pyrochlores / d'Acapito, F. [et al.] // JETP Letters. - 2019. - 109. - № 8. - P. 529-535. - 10.1134/S0021364019080095
URI
https://www.doi.org/10.1134/S0021364019080095
https://www.scopus.com/record/display.uri?eid=2-s2.0-85068551294&origin=resultslist
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https://openrepository.mephi.ru/handle/123456789/18364
https://www.scopus.com/record/display.uri?eid=2-s2.0-85068551294&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000474413200009
https://openrepository.mephi.ru/handle/123456789/18364