Abstract
The superconducting critical temperature () of ferromagnet-superconductor-ferromagnet systems has been predicted to exhibit a dependence on the magnetization orientation of the ferromagnetic layers such that for parallel () and antiparallel (AP) configurations of the two ferromagnetic layers. We have grown films via magnetron sputtering and confirmed the theoretical prediction by measuring the resistance of the system as a function of temperature and magnetic field. We find an resistance drop occurs near in when the two CuNi layers change their magnetization directions from parallel to antiparallel, whereas there is no corresponding resistance change in the normal state.
- Received 15 May 2002
DOI:https://doi.org/10.1103/PhysRevLett.89.267001
©2002 American Physical Society