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SUMMARY:Spin injection into semiconductors from ferromagnetic materials - 
 Dr Rhodri Mansell\, Thin Film Magnetism Group\, University of Cambridge
DTSTART:20101108T141500Z
DTEND:20101108T160000Z
UID:TALK27405@talks.cam.ac.uk
CONTACT:afw24
DESCRIPTION:This talk will start with an introduction to the field of spin
 tronics\, which aims to control electronic devices using the spin of the e
 lectron rather than the charge. The emphasis will be on ferromagnetic meta
 l / semiconductor hybrid systems\, including the resistance mismatch probl
 em and results on all-electrical devices.\n\nIn detail\, the talk will cov
 er research carried out on the injection of spin polarized current into se
 miconductor p-i-n LEDs from iron and magnetite thin films. Measuring the p
 olarization of the light emitted from the LED we can determine the polariz
 ation of the electrons across the semiconductor / metal interface. From ir
 on films a polarization of 4.5 % has been measured and from magnetite 1.6 
 %. Reasons for the small size of the observed polarizations will be discus
 sed.
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
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