Interfacial Polarization Of The Ferromagnetic / Organic System, The Injection And Transport Research

As a new kind of functional material, conjugated polymers or small oligomers have been attracting much theoretical and experimental interest both because of the unique electric, magnetic and optical properties that occur in these materials and because of the technological potential of electronic devices fabricated from them. In particular, they are already the basis of effective organic light-emitting diodes (OLEDs) and a wider range of devices and applications such as organic spin valves and magnetic resistance. On the other hand, conjugated polymers have common characteristic of the soft condensed matters and can serve as a medium to understand other organic and even biological molecules. Up to now, there have been extensive studies on organic and DNA molecular electronics. The single molecular switch and wire have been successfully fabricated and can be used to design the devices focusing on the logical computation in the scale of a single molecule. In addition, DNA molecules exist in a form of the dynamic random state, so that they can behave as a metallic conductor, a semiconductor, or an insulator, according to different contacts, molecular lengths, and ambient surroundings. In conclusion, all the studies indicate that the organic materials have abundant physical and functional properties and we have to investigate such materials using a comprehensive method which may be related with physics, chemistry and even biology.Magneto-electronics or spintronics is a field of growing interest. Since the discovery of giant magneto-resistance (GMR), rapid progress has been made in this field. Electron spin injection and spin-dependent transport are essential aspects of spintronics and have been extensively studied in a number of different contexts including: ferromagnetic metals to superconductors, ferromagnetic metals to normal metals, ferromagnetic metals to nonmagnetic semiconductors, magnetic semiconductors to nonmagnetic semiconductors, or a combination of these configurations. Conjugated polymers have been ideal materials for spin injection since the discovery of long spin diffusion length due to the very small spin-orbit coupling...