Infrared study of YBa2Cu3O7/La0.67Ca0.33MnO3 superlattices

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Authors

DUBROKA Adam CRISTIANI G. HABERMEIER H.-U. HUMLÍČEK Josef

Year of publication 2004
Type Article in Periodical
Magazine / Source Thin Solid Films
MU Faculty or unit

Faculty of Science

Citation
Field Solid matter physics and magnetism
Keywords Infrared ellipsometry; Superlattice; La1-xCaxMnO3; YBa2Cu3O7
Description The infrared response of superlattices (SLs) composed of YBa2Cu3O7 (YBCO) and La0.67Ca0.33MnO3 (LCMO) on SrTiO3substrate has been studied by ellipsometry in the range from 400 to 5000 cm-1. We use a model calculation of the optical response to distinguish the contribution of the SL and the substrate.The infrared data provide an evidence of a strong interaction between the YBCO and LCMO layers.The mid-infrared resonance located at approximately 1000-3000 cm-1 is discussed in terms of the polaronic absorption in LCMO.The resonance could indicate a charge transfer from the YBCO to the LCMO layers.
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