XPS Study of Mechanically Activated YBa2Cu3O6+δ and NdBa2Cu3O6+δ
Joint Authors
Vedmid', L. B.
Kozhina, G. A.
Uporov, S. A.
Mitrofanov, V. Ya.
Fetisov, V. B.
Fetisov, A. V.
Estemirova, S. Kh.
Source
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-05-15
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Oxides RBa2Cu3O6+δ (R=Y, Nd) subjected to mechanical activation in AGO-2 mill have been studied by X-ray photoelectron spectroscopy (XPS), thermal analysis, and magnetometry.
It has been shown that mechanoactivation accelerates chemical degradation under the impact of H2O and CO2 in YBa2Cu3O6+δ samples.
Degradation occurs in the standard way.
Investigation of mechanically activated NdBa2Cu3O6+δ has revealed other results.
It has been suggested that CO2 can diffuse into its structure more freely than in YBa2Cu3O6+δ; as a result, carbonization may proceed directly in the volume of NdBa2Cu3O6+δ and independently of the hydrolysis process.
In addition, the mechanism of interaction between the oxide and water is not active and not “traditional” for the homologous series REBa2Cu3O6+δ (where RE = rare earth and Y)—the characteristic “color” phase (Nd2BaCuO5) is not formed during hydrolysis.
It is known that high-temperature treatment of NdBa2Cu3O6+δ oxide results in partial substitution of cations Ba by Nd; which is accompanied by decrease in the superconducting transition temperature and formation of the impurity phase Ba2Cu3O5+y.
According to our data, mechanical activation of the resulting solid solution Nd1+xBa2−xCu3O6+δ unexpectedly has led to the reverse redistribution of cations, which has been manifested in the complete disappearance of the impurity phase and increase in Tc.
American Psychological Association (APA)
Fetisov, A. V.& Kozhina, G. A.& Estemirova, S. Kh.& Fetisov, V. B.& Mitrofanov, V. Ya.& Uporov, S. A.…[et al.]. 2013. XPS Study of Mechanically Activated YBa2Cu3O6+δ and NdBa2Cu3O6+δ. Journal of Spectroscopy،Vol. 2013, no. 2013, pp.1-13.
https://search.emarefa.net/detail/BIM-455376
Modern Language Association (MLA)
Fetisov, A. V.…[et al.]. XPS Study of Mechanically Activated YBa2Cu3O6+δ and NdBa2Cu3O6+δ. Journal of Spectroscopy No. 2013 (2013), pp.1-13.
https://search.emarefa.net/detail/BIM-455376
American Medical Association (AMA)
Fetisov, A. V.& Kozhina, G. A.& Estemirova, S. Kh.& Fetisov, V. B.& Mitrofanov, V. Ya.& Uporov, S. A.…[et al.]. XPS Study of Mechanically Activated YBa2Cu3O6+δ and NdBa2Cu3O6+δ. Journal of Spectroscopy. 2013. Vol. 2013, no. 2013, pp.1-13.
https://search.emarefa.net/detail/BIM-455376
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-455376