Spin transport in organics and organic spin devices

Z.G. Yu, M.A. Berding and S. KrishnamurthyAbstract: The authors present a theory to describe spi n transport across a polymer sandwichedbetween magnetic contacts and propose organic sp in devices based on this theory. It is found thateven a weak magnetic field can significantly m odify spin transport in polymers through spinprecession. This sensitivity can be exploited to de sign ultrasensitive magnetometers and low-powermagnetic-field-effect transistors. It is shown tha t, at room temperature, the organic magnetometersare capable of detecting sub-nanotesla magnetic fie lds, and the I–V characteristics of the magnetic-field-effect transistors can be strongly modified by magnetic fields of a few gauss with responsetimes of a few nanoseconds.