Strain Dependence of Critical Fields—Studied on Piezoelectric Substrates

Author

Trommler, Sascha ; Molatta, Sebastian ; Hanisch, Jens ; Iida, Kazumasa ; Schultz, Ludwig ; Huhne, Ruben

Volume

Issue

fYear

2015

fDate

Jun-15

Firstpage

Lastpage

Abstract

$\\hbox {La}_{{\\ker n-.5pt}1{\\ker n-.5pt}.{\\ker n-.5pt}85}{\\ker n-.5pt}\\hbox {Sr}_{{\\ker n-.5pt} 0{\\ker n-.5pt}.{\\ker n-.5pt}15}{\\ker n-.5pt}\\hbox {CuO}_{{\\ker n-.5pt}4}$ , $\\hbox {BaFe}_{{\\ker n-.5pt}1{\\ker n-.5pt}.{\\ker n-.5pt}8}{\\ker n-.5pt}\\hbox {Co}_{{\\ker n-.5pt} 0{\\ker n-.5pt}.{\\ker n-.5pt}2}{\\ker n-.5pt}\\hbox {As}_{{\\ker n-.5pt}2}$ and $\\hbox {FeSe}_{{\\ker n-.5pt}0{\\ker n-.5pt}.{\\ker n-.5pt}5}{\\ker n-.5pt}\\hbox {Te}_{{\\ker n-.5pt}0.5}$ thin films have been prepared on piezoelectric (001) $\\hbox {Pb}(\\hbox {Mg}_{1/3}\\hbox {Nb}_{2/3})_{0.72}\\hbox {Ti}_{0.28}\\hbox {O}_{3}$ substrates. By the use of the inverse piezoelectric effect, biaxial strain was induced into the films by applying an electric field to the sample. The strain sensitivity of the upper critical field and of the irreversibility line was determined by the analysis of the resistive transition. A biaxial compression in the order of 0.02% results in a shift of these fields. A consistent description of the field dependence is possible taking into account a strain dependent transition temperature. No influence of the strain state on the anisotropy of the upper critical field was found in first approximation.

Keywords

Epitaxial growth; Strain; Substrates; Superconducting transition temperature; Temperature dependence; Temperature measurement; Critical fields; Fe-based superconductors; critical fields; cuprates; strain;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2014.2369733

Filename

6954390

Link To Document

https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=37271