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Browse Journals & Magazines > Applied Physics Letters ...> Volume:76 Issue:23 Help

Effect of interfacial strain on critical temperature of YBa2Cu3O7-δ thin films

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2 Author(s)
Zhai, H.Y. ; Department of Physics and Texas Center for Superconductivity, University of Houston, 3201 Cullen Boulevard, Houston, Texas 77204 ; Chu, W.K.

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Ultrathin YBa2Cu3O7-δ (YBCO) films down to two unit cells thick have been prepared on LaAlO3 (LAO) and SrTiO3 (STO) substrates for the study of substrate-induced strain effects on critical transition temperature (Tc). The YBCO on LAO has a higher Tc than that on STO for very thin films, and this Tc difference increases with reduction of film thickness. X-ray diffraction experiments reveal that compressive strain exists in the a–b plane for YBCO thin films on LAO, while tensile strain occurs for films on STO. The different stresses in these films account for the Tc difference. © 2000 American Institute of Physics.

Published in:
Applied Physics Letters  (Volume:76 ,  Issue: 23 )

Date of Publication: Jun 2000

Page(s):
3469 - 3471
ISSN :
0003-6951
Digital Object Identifier :
10.1063/1.126680
Product Type:
Journals & Magazines
Date of Current Version :
18 June 2009
Issue Date :
Jun 2000

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