Thickness dependent spin-injection effects in Nd0.7Ca 0.3MnO3/YBa2Cu3O7 bilayers
Journal
Journal of Applied Physics
Journal Volume
Vol. 103
Journal Issue
Issue 3
Pages
07C710-1.
Date Issued
2008
Author(s)
Abstract
Two Nd0.7Ca0.3MnO3∕YBa2Cu3O7 (NCMO/YBCO) bilayers with different thickness ratios are fabricated and the spin-injection effects are investigated. The NCMO/YBCO samples have thicknesses of 100nm∕200nm and 200nm∕200nm, which are denoted as N/Y(1) and N/Y(2), respectively. It is shown that the current-induced suppression rate of superconducting transition temperature (dTc∕dI) in YBCO is enhanced by four to six times of magnitude in N/Y(1) and N/Y(2) compared with that in pure YBCO. Furthermore, dTc∕dI in N/Y(2) is larger than that in N/Y(1), which suggests that the thickness of NCMO has influence on the pair breaking in YBCO.
Type
journal article