ANISOTROPY OF OPTICAL-CONSTANTS OF YBCO

D George Walmsley, A. Sellai, P.G. Mccafferty, Paul Dawson, C.C. Smyth, Thomas Morrow, Bill Graham

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Otto configuration attenuated total reflection (ATR) measurements of the excitation of surface plasmons in the infrared have been carried out on YBCO films deposited on MgO (100) substrates. The dielectric constants for YBCO at 3.392 mu m are determined to be -10 + 15i for c-axis material. The anisotropic nature of the cuprate is seen from films with other orientations: nearly a-axis material has constants of 4.0 + 7.0i. It is thus not metallic in its optical response along the c-axis which lies parallel to the substrate plane. Ellipsometric measurements in the visible on c-axis material point to a maximum surface plasmon energy of 1 eV.
Original languageEnglish
Pages (from-to)943-946
Number of pages4
JournalJournal of Superconductivity
Volume7
Publication statusPublished - 1994

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