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.
Related projects:	Physical properties of new materials and layered structures