Investigation of the strain-sensitive superconducting transition of BaFe1.8Co0.2As2 thin films utilizing piezoelectric substrates

11th European Conference on Applied Superconductivity

Trommler, S.^2 ; Hänisch, J.^1 ; Iida, K.^1 ; Kurth, F.^1 ; Schultz, L.^2 ; Holzapfel, B.^3 ; Hühne, R.^1

IFW Dresden, Institute for Metallic Materials, PO Box 270116, Dresden

01171, Germany^1

Technische Universität Dresden, Department of Physics, Institute for Physics of Solids, Dresden

01062, Germany^2

TU Bergakademie Freiberg, Freiberg

09596, Germany^3

关键词: Compressive strain;    High electric fields;    Inverse piezoelectric effects;    MgO single crystals;    Piezoelectric substrates;    Resistive transition;    Superconducting layer;    Superconducting transitions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/507/1/012049/pdf
DOI  :  10.1088/1742-6596/507/1/012049

来源: IOP

【 摘 要 】

The preparation of biaxially textured BaFe1.8Co0.2As2thin films has been optimized on MgO single crystals and transfered to piezoelectric (001) Pb(Mg1/3Nb2/3)0.72Ti0.28O3substrates. 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%.