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SUMMARY:Magnetic properties of EuO- Mr. Pedro Monterio\, TFM - Mr. Pedro M
 onterio\, TFM
DTSTART:20121129T143000Z
DTEND:20121129T160000Z
UID:TALK41218@talks.cam.ac.uk
CONTACT:Kimberly Cole
DESCRIPTION:The ferromagnetic semiconductor EuO\, with Curie temperature T
 c = 69 K has long been considered a model system since the magnetic moment
  is highly localized and the exchange interactions are well approximated b
 y the Heisenberg model. Renewed interest has developed because of the poss
 ibility of using it in thin-film form as a spin-filter in contact with Si\
 , Ge\, or GaAs. Spin injection from EuO into Si has been demonstrated with
  an extremely high polarization (above 90 %). Despite these highly desirab
 le properties\, the low Curie temperature of EuO currently keeps it from t
 echnological development in spintronics applications.\n\nIn this talk I wi
 ll discuss how the magnetic moment and Tc change with the film thickness. 
 I will also explore the physics underlying the Tc enhancement of oxygen de
 ficient EuO and La-doped EuO showing some insights from muon spin rotation
  and relaxation measurements.\n
LOCATION:Mott Seminar Room\, Cavendish Laboratory
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