Strain enhanced spin polarization in Nd0.43Sr 0.57MnO3/YBa2Cu3O7 bilayers
Journal
Journal of Applied Physics
Journal Volume
104
Journal Issue
5
Date Issued
2008
Author(s)
Abstract
Electrical and magnetic properties of antiferromagnetic/superconducting bilayers Nd0.43Sr0.57MnO3/YBa2Cu3O7 (NSMO/YBCO) are investigated as functions of NSMO thickness (d) and current density (J). The superconducting transition temperatures (Tc) of bilayers decrease monotonically with decreasing d, and the suppression rate of Tc with J (dTc/dJ) is enhanced by three orders of magnitude in NSMO(d)/YBCO compared with that in pure YBCO. Based on the analysis on the d dependencies of Tc and dTc/dJ, it is suggested that the strain enhanced spin polarization is responsible for the great suppression of superconductivity in NSMO(d)/YBCO with d=40 and 80 nm.
SDGs
Type
journal article