Intracell Changes in Epitaxially StrainedYBa2Cu3O7−xUltrathin Layers inYBa2Cu3O7−x/PrBa2Cu3O7Superlattices

Autor:	Diego Arias, Jesus Santamaria, F. Sánchez-Quesada, M. L. Lucía, M.A. Navacerrada, C. Leon, Zouhair Sefrioui, M. A. López de la Torre, G. D. Loos, Maria Varela
Rok vydání:	1999
Předmět:	Crystallography Materials science High oxygen Sputtering Superlattice General Physics and Astronomy Surface finish Epitaxy
Zdroj:	Physical Review Letters. 83:3936-3939
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.83.3936
Popis:	The structure of high quality [YBCO_(N)/PBCO_(M)]_(1000 A) superlattices, with N ranging between 1 and 12 unit cells and M = 5 unit cells, grown by high oxygen pressure sputtering, is analyzed. Intracell atomic structure of the layers along the c axis and disorder at interfaces is investigated using an x-ray refinement technique. Negligible roughness, step disorder, and interdiffusion are found at the interfaces. Epitaxial mismatch strain results in a surprising reorganization of interatomic distances for the thinnest YBCO layers, which seems to correlated with the decrease in the critical temperature. Intracell structure is invoked as an additional source of T_(c) changes in very thin YBCO layers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c87da5c607f37af645a4274c0e15de6f https://doi.org/10.1103/physrevlett.83.3936 Zobrazit plný text záznamu