| AVS 63rd International Symposium & Exhibition | |
| Magnetic Interfaces and Nanostructures | Tuesday Sessions |
| Session MI-TuA |
| Session: | Magnetic Phenomena in Organic Systems |
| Presenter: | Daniel Dougherty, North Carolina State University |
| Authors: | D.B. Dougherty, North Carolina State University J. Wang, North Carolina State University A. Deloach, North Carolina State University |
| Correspondent: | Click to Email |
The field of organic spintronics has focused dominant attention on organic emitters such as tris-(8-hydroxyquinolate) aluminum (Alq3). This particular molecule has been reported to show large magnetoresistive effects including a 300% effect nanoscale tunnel barriers [1] that is tied to molecular orbital mixing at the magnetic electrode interface. Here we report on a direct study of this orbital mixing using spin polarized scanning tunneling microscopy and local spectroscopy measurements. We focus on the well-known Alq3 molecule adsorbed on a Cr(001) surface and report evidence for spin polarized interface states near the Fermi level. When the adsorbate is replaced with the paramagnetic variant Crq3, the interface remains polarized but the magnetic states are significantly farther from the Fermi level. These results will be discussed in the broad context of molecular orbital control if interfacial polarization in tunneling devices.
[1]Barraud et al., Nat. Phys. 6, 615 (2010).