Interfacial diffusion between magnetic electrodes and organic spacer layers is a serious problem in the organic spintronics which complicates attempts to understand the spin-dependent transport mechanism and hurts the achievement of a desirably high magnetoresistance (MR). We deposit nanodots instead of atoms onto the organic layer using buffer layer assist growth. Spin valves using this method exhibit a sharper interface and a giant MR of up to ̃300%. Analysis of the current-voltage characteristics indicates that the spin-dependent carrier injection correlates with the observed MR.
Physical Review Letters
- Pub Date:
- June 2010
- Spin transport through interfaces;
- Spin polarized transport in semiconductors;
- organic compounds;
- spintronics: devices exploiting spin polarized transport or integrated magnetic fields