Thermoelectric properties of YBa2Cu3O7−δ–La2/3Ca1/3MnO3 superlattices

We report measurements of the thermoelectric power and electrical resistivity of superlattices composed of the high-temperature superconductor YBa2Cu3O7−δ (YBCO) and the metallic ferromagnet La2/3Ca1/3MnO3 (LCMO) with individual layer thicknesses between 5 and 50 nm. Whereas YBCO and LCMO reference...

Full description

Saved in:
Bibliographic Details
Published in:Applied physics letters 2012-09, Vol.101 (13)
Main Authors: Heinze, S., Habermeier, H.-U., Cristiani, G., Blanco Canosa, S., Le Tacon, M., Keimer, B.
Format: Article
Language:English
Subjects:
COPPER OXIDE
ELECTRICAL CONDUCTIVITY
ELECTRICAL PROPERTIES
Electrical resistivity
ELECTRONIC PRODUCTS
Electronics
Ferromagnetism
High temperature superconductors
Lattice strain
LATTICES (CRYSTAL)
MAGNETIC PROPERTIES
STRAIN
SUPERCONDUCTORS
Superlattices
Thermoelectricity
YBCO superconductors
YTTRIUM OXIDE
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report measurements of the thermoelectric power and electrical resistivity of superlattices composed of the high-temperature superconductor YBa2Cu3O7−δ (YBCO) and the metallic ferromagnet La2/3Ca1/3MnO3 (LCMO) with individual layer thicknesses between 5 and 50 nm. Whereas YBCO and LCMO reference films prepared under the same conditions exhibit negative Seebeck coefficients, in excellent agreement with data on bulk compounds of identical composition, those of all superlattices are positive, regardless of the individual layer thickness. Having ruled out lattice strain and incomplete oxygenation, we attribute the observed sign reversal of the Seebeck coefficient to a long-range electronic reconstruction nucleated at the YBCO-LCMO interfaces.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4754707