Ontology type: schema:ScholarlyArticle
2019-04
AUTHORSA. P. Menushenkov, V. V. Popov, B. R. Gaynanov, A. A. Ivanov, A. V. Kuznetsov, A. A. Yaroslavtsev, F. d’Acapito, A. Puri
ABSTRACTThe 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. More... »
PAGES529-535
http://scigraph.springernature.com/pub.10.1134/s0021364019080095
DOIhttp://dx.doi.org/10.1134/s0021364019080095
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