Browsing by Author "Vaz, C. A. F."

Now showing items 1-5 of 5

    • Article  

      Highly efficient spin filtering of ballistic electrons 

      Steinmuller, S. J.; Trypiniotis, Theodossis; Cho, W. S.; Hirohata, A.; Lew, W. S.; Vaz, C. A. F.; Bland, J. A. C. (2004)
      Spin dependent electron transport in hybrid Au/Co/Cu/NiFe/n-GaAs spin valve Schottky barrier structures was investigated using photoexcitation at various wavelengths. For excitation with the photon energy well above the ...
    • Conference Object  

      Highly efficient spin filtering of ballistic electrons in hybrid spin valve/semiconductor structures 

      Steinmuller, S. J.; Trypiniotis, Theodossis; Hirohata, A.; Cho, W. S.; Lew, W. S.; Vaz, C. A. F.; Bland, J. A. C. (2004)
      The highly efficient spin filtering of ballistic electrons in hybrid spin valve/semiconductor (SC) structures was discussed. It was found that the photocurrent was dependent on the relative alignment of the light helicity ...
    • Article  

      Magnetic and structural properties of stoichiometric thin Fe 3Si/GaAs(0 0 1) films 

      Ionescu, A.; Vaz, C. A. F.; Trypiniotis, Theodossis; Gürtler, C. M.; Vickers, M. E.; García-Miquel, H.; Bland, J. A. C. (2005)
      In this study, we report experimental results on the structural and magnetic properties of epitaxial Fe3Si films grown on GaAs(0 0 1) by co-evaporation. X-ray reflectivity shows that relatively smooth interfaces are obtained ...
    • Article  

      Magnetic properties of Fe/AlO x/GaAs(001) structures 

      Vaz, C. A. F.; Ionescu, A.; Trypiniotis, Theodossis; Bland, J. A. C.; Dalgliesh, R. M.; Langridge, S. (2005)
      We report results on the effect of the Al Ox barrier layer on the magnetic moment of Fe using polarized neutron reflection. The sample has nominal composition 25 nm Au5 nm Fe1.3 nm Al Ox GaAs (001). The metal deposition ...
    • Article  

      Structural, magnetic, electronic, and spin transport properties of epitaxial Fe 3Si/GaAs(001) 

      Ionescu, A.; Vaz, C. A. F.; Trypiniotis, Theodossis; Gürtler, C. M.; García-Miquel, H.; Bland, J. A. C.; Vickers, M. E.; Dalgliesh, R. M.; Langridge, S.; Bugoslavsky, Y.; Miyoshi, Y.; Cohen, L. F.; Ziebeck, K. R. A. (2005)
      We report experimental results on the structural, magnetic, electronic, and spin transport properties of a 21 nm Fe 3Si/GaAs(001) heterostructure epitaxially grown by coevaporation. High-resolution x-ray diffraction shows ...