Browsing by Author "Clowes, S. K."

Now showing items 1-6 of 6

    • Article  

      Large positive magnetoresistance in nonstoichiometric NiMnSb thin films on silicon 

      Branford, W. R.; Clowes, S. K.; Syed, M. H.; Bugoslavsky, Y. V.; Gardelis, S.; Androulakis, J.; Giapintzakis, John; Grigorescu, C. E. A.; Berenov, A. V.; Roy, S. B.; Cohen, L. F. (2004)
      The transport properties of pulsed-laser-deposited NiMnSb films on silicon as a function of film thickness were discussed. It was found that a low-temperature upturn was observed in the resistivity for film thicknesses of ...
    • Conference Object  

      Oblique hanle measurements of InAs/GaAs quantum dot spin-light emitting diodes 

      Itskos, Grigorios; Harbord, E.; Clowes, S. K.; Clarke, E.; Van Dorpe, P.; Van Roy, W.; Cohen, L. F.; Murray, R. (2007)
      We report here electrical spin injection through an Fe contact into a quantum dot light emitting diode structure using the oblique Hanle geometry. The measured spin polarization in the ground state of the dots is estimated ...
    • Article  

      Oblique Hanle measurements of InAsGaAs quantum dot spin-light emitting diodes 

      Itskos, Grigorios; Harbord, E.; Clowes, S. K.; Clarke, E.; Cohen, L. F.; Murray, R.; Van Dorpe, P.; Van Roy, W. (2006)
      We report on studies of electrical spin injection from ferromagnetic Fe contacts into semiconductor light emitting diodes containing single layers of InAsGaAs self-assembled quantum dots (QDs). An oblique magnetic field ...
    • Article  

      Spin polarisation and anomalous Hall effect in NiMnSb films 

      Branford, W. R.; Roy, S. B.; Clowes, S. K.; Miyoshi, Y.; Bugoslavsky, Y. V.; Gardelis, S.; Giapintzakis, John; Cohen, L. F. (2004)
      NiMnSb has attracted a great deal of interest as a spin injector/detector in spintronic devices because it has a Curie temperature of 728 K and is predicted to be half-metallic (100% spin polarized). NiMnSb has been reported ...
    • Article  

      Synthesis and physical properties of arc melted NiMnSb 

      Gardelis, S.; Androulakis, J.; Migiakis, P.; Giapintzakis, John; Clowes, S. K.; Bugoslavsky, Y.; Branford, W. R.; Miyoshi, Y.; Cohen, L. F. (2004)
      The synthesis and physical properties of arc melted NiMnSb were studied using X-ray diffraction analysis. It was observed that the half metallicity in NiMnSb is supported by the integer saturation magnetization value at 5 ...
    • Article  

      Thickness dependence of Hall transport in Ni1.15Mn 0.85Sb thin films on silicon 

      Branford, W. R.; Clowes, S. K.; Bugoslavsky, Y. V.; Gardelis, S.; Androulakis, J.; Giapintzakis, John; Grigorescu, C. E. A.; Manea, S. A.; Freitas, R. S.; Roy, S. B.; Cohen, L. F. (2004)
      Highly spin polarized Heusler alloys, NiMnSb and Co2MnSi, attract a great deal of interest as potential spin injectors for spintronic applications. Spintronic devices require control of interfacial properties at the ...