Investigation of the strain-sensitive superconducting transition of BaFe sub(1.8)Co sub(0.2)As sub(2) thin films utilizing piezoelectric substrates

The preparation of biaxially textured BaFe sub(1.8)Co sub(0.2)As sub(2) thin films has been optimized on MgO single crystals and transfered to piezoelectric (001) Pb(Mg sub(1/3)Nb sub(2/3)) sub(0.72)Ti sub(0.28)O sub(3) substrates. By utilizing the inverse piezoelectric effect the lattice parameter...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-01, Vol.507, p.1-4
Main Authors: Trommler, S, Hanisch, J, Iida, K, Kurth, F, Schultz, L, Holzapfel, B, Huhne, R
Format: Article
Language:English
Subjects:
Compressive properties
Electric fields
Inverse
Magnesium oxide
Piezoelectricity
Strain
Superconductivity
Thin films
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Summary:The preparation of biaxially textured BaFe sub(1.8)Co sub(0.2)As sub(2) thin films has been optimized on MgO single crystals and transfered to piezoelectric (001) Pb(Mg sub(1/3)Nb sub(2/3)) sub(0.72)Ti sub(0.28)O sub(3) substrates. By utilizing the inverse piezoelectric effect the lattice parameter of these substrates can be controlled applying an electric field, leading to a induction of biaxial strain into the superconducting layer. High electric fields were used to achieve a total strain of up to 0.05% at low temperatures. A sharpening of the resistive transition and a shift of about 0.6 K to higher temperatures was found at a compressive strain of 0.035%.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/507/1/012049