| AVS 54th International Symposium | |
| Magnetic Interfaces and Nanostructures | Friday Sessions |
| Session MI-FrM |
| Session: | Spin Injection, Transfer, and Tunneling |
| Presenter: | C.-J. Sun, Oak Ridge National Laboratory |
| Authors: | C.-J. Sun, Oak Ridge National Laboratory B. Hu, University of Tennessee, Knoxville J. Shen, Oak Ridge National Laboratory |
| Correspondent: | Click to Email |
Organic spintronics is an emerging field of nanoscale electronics involving the detection and manipulation of electronic spins in heterostructures that consist of organic and magnetic materials.1 Compared to conventional inorganic spintronics, organic spintronics offer distinct advantages such as ease of device fabrication and intrinsic low spin scattering rate and high spin coherence over both time and distance.2 These characteristics make organic spintronic devices plausible to operate at room temperature.3 In this study, we fabricated spin valve devices that uses Co thin films and a manganite thin film as two ferromagnetic electrodes and an organic molecule layer as the spacer layer. A modified superconducting quantum interference device (SQUID) is used to measure local tunneling magneto-resistance (TMR) and determine spin injection efficiency as a function of thickness of Co thin films, bias voltage, and operating temperature. The mechanism of spin injection from Co thin films is addressed.
1Z. H. Xiong, D. Wu, Z.V. Vardeny, and J. Shi, "Giant magnetoresistance in organic spin-valves", Nature 427, 821 (2004).
2Alexander R. Rocha, Victor M. Garcia-Suarez, Steve W. Bailey, Colin J. Lambert, Jaime Ferrer, Stefano Sanvito, "Towards molecular spintronics", Nature Mater. 4, 335(2005).
3V. Dediu, M. Murgia, F. C. Matacotta, C. Taliani, S. Barbanera, "Room temperature spin polarized injection in organic semiconductor", Sol. Stat .Comm. 122, 181(2002). .