Dependence of Van-Vleck paramagnetism on the size of nanocrystals in superstoichiometric Ti[O.sub.y]

In situ measurements of the magnetic susceptibility of titanium monoxide nanocrystals with super-stoichiometric composition Ti[O.sub.y] (y > 1) in the 300-1200 K temperature range showed that this value depends not only on the structural state of a sample, but also on the size of crystals. Analys...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2016-04, p.722
Main Authors: Valeeva, A.A, Nazarova, S.Z, Rempel, A.A
Format: Article
Language:English
Subjects:
Analysis
Titanium
Online Access:Get full text
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Summary:In situ measurements of the magnetic susceptibility of titanium monoxide nanocrystals with super-stoichiometric composition Ti[O.sub.y] (y > 1) in the 300-1200 K temperature range showed that this value depends not only on the structural state of a sample, but also on the size of crystals. Analysis of data obtained for both ordered and disordered Ti[O.sub.y] showed that the Van-Vleck paramagnetism is inversely proportional to the nanocrystal size because of breakage of the symmetry of local environment of the near-surface atoms of titanium and oxygen. The Van-Vleck paramagnetism contribution due to atomic-vacancy disorder in superstoichiometric titanium monoxide nanocrystals, as well as in the stoichiometric composition, is proportional to a deviation of the degree of long-range order from its maximum value.
ISSN:1063-7761
1090-6509
DOI:10.1134/S1063776116020138