Observation of an oxygen isotope effect in superconducting (Y1−xPrx)Ba2Cu3O7−δ

Autor:	G.I. Sproule, M. A.-K. Mohamed, Jurgen P. Franck, S. Gygax, J. Jung
Rok vydání:	1991
Předmět:	Superconductivity Oxygen-18 Materials science Stable isotope ratio Transition temperature Kinetic isotope effect Exponent Analytical chemistry Stoichiometry Oxygen-16
Zdroj:	Physical Review B. 44:5318-5321
ISSN:	1095-3795 0163-1829
Popis:	The oxygen isotope effect was studied in the system (Y{sub 1{minus}{ital x}}Pr{sub {ital x}})Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} for {ital x}=0.2, 0.3, 0.4, and 0.5. It is found that the oxygen isotope exponent {alpha} increases with increasing {ital x} and therefore decreasing transition temperature {ital T}{sub {ital c}}. For the highest Pr concentrations {alpha} tends toward {alpha}=0.5. The value of the isotope exponent depends on the concentration of mobile holes. The lower this concentration is, the larger becomes the isotope exponent.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::743333fc1fe44d9a173a6c467635f80e https://doi.org/10.1103/physrevb.44.5318 Zobrazit plný text záznamu