| AVS 55th International Symposium & Exhibition | |
| Magnetic Interfaces and Nanostructures | Thursday Sessions |
| Session MI-ThM |
| Session: | Magnetic Surfaces, Interfaces, Thin Films and Heterostructures |
| Presenter: | A.N. Caruso, U. of Missouri - Kansas City |
| Authors: | A.N. Caruso, U. of Missouri - Kansas City K.I. Pokhodnya, North Dakota State U. W.W. Shum, U. of Utah W.-Y. Ching, U. of Missouri - Kansas City B. Anderson, North Dakota State U. M.T. Bremer, North Dakota State U. E. Vescovo, Brookhaven National Lab. P. Rulis, U. of Missouri - Kansas City A.J. Epstein, Ohio State U. J.S. Miller, U. of Utah |
| Correspondent: | Click to Email |
Successful semiconductor magnetoelectronic device operation requires solids with the ability to inject and/or retain carrier spin polarization across multiple interfaces. Inorganic transition metal doped semiconductors (postulated dilute magnetic semiconductors such as Co:TiO2 and Mn:GaAs) have not been able to meet these criterion at room temperature due to solubility problems.1 Organic-based magnets however, offer increased interfacial stability and elastic spin carrier lifetimes, due to the small differences between their surface and bulk free energies, and low spin-orbit scattering and/or hyperfine interactions.2 The remaining piece is to directly show that organic-based magnets are indeed capable of electron spin polarization at or near the Fermi edge. The first direct evidence of an organic-based magnet with a finite electron spin polarization at the Fermi edge, collected from spin resolved photoemission of [FeII(TCNE)(NCMe)2][FeIIICl4]3 will be presented. An ab initio calculation of the spin resolved band structure will also be presented, backing the claim that [FeII(TCNE)(NCMe)2][FeIIICl4] is a half-semiconductor. Lastly, the electronic structure relationship between magnetic exchange and structural bonding will be discussed within the context of the experimental and computational results.
1A. R. Rocha, V. M. Garcia-Suarez, S. W. Bailey, C. J. Lambert, J. Ferrer, S. Sanvito, Nature Materials 4, 335 (2005).
2Satishchandra Ogale, Darshan Kundaliya, Shareghe Mehraeen, Lian-feng Fu, Shixiong Zhang, Alexandre Lussier, Joe Dvorak, Nigel Browning, Yves Idzerda, Thirumalai Venkatesan, Chem. Mater. 20, 1344 (2008).
3K. I. Pokhodnya, M. Bonner, J.-H. Her, P. W. Stephens, J. S. Miller, J. Amer. Chem. Soc. 128, 15592 (2006).