• Article  

      Comparison of free surface polarization of NiMnSb and Co2 MnSi 

      Miyoshi, Y.; Bugoslavsky, Y.; Syed, M. H.; Robinson, T.; Cohen, L. F.; Singh, L. J.; Barber, Z. H.; Grigorescu, C. E. A.; Gardelis, S.; Giapintzakis, John; Roy, W. Van (2006)
      We present a systematic study of the polarization of the transport current from a variety of NiMnSb and Co2 MnSi thin films and bulk material using point contact Andreev reflection spectroscopy. The simple analysis suggests ...
    • Article  

      Low-temperature catalytic decomposition of ethylene into H2 and secondary carbon nanotubes over Ni/CNTs 

      Savva, Petros G.; Polychronopoulou, Kyriaki; Ryzkov, V. A.; Efstathiou, Angelos M. (2010)
      The present work reports on the production of H2 and secondary carbon nanotubes (CNTs) during catalytic decomposition of ethylene over a novel catalytic system, namely, nickel supported on carbon nanotubes (Ni/CNTs) at ...
    • Article  

      Modeling of the self-propagating reactions of nickel and aluminum multilayered foils 

      Gunduz, I. E.; Fadenberger, K.; Kokonou, M.; Rebholz, Claus; Doumanidis, C. C.; Ando, T. (2009)
      In this study, we performed simulations of self-propagating reactions of nanoscale nickel-aluminum multilayers using numerical methods. The model employs two-dimensional heat transfer equations coupled with heat generation ...
    • Article  

      Pulsed-laser deposition of NiMnSb thin films at moderate temperatures 

      Giapintzakis, John; Grigorescu, C.; Klini, A.; Manousaki, A.; Zorba, V.; Androulakis, J.; Viskadourakis, Z.; Fotakis, C. (2002)
      Thin films of the half-Heusler alloy NiMnSb, which is predicted by band-structure calculations to be a half-metallic ferromagnet, were grown on various substrates (Si and InAs) using pulsed-laser deposition. The growth ...
    • Article  

      Surface particularities in pulsed laser ablation/deposition of the ferromagnetic alloy NiMnSb 

      Grigorescu, C. E. A.; Manea, S. A.; Mitrea, M.; Monnereau, O.; Notonier, R.; Tortet, L.; Keschawarz, R.; Giapintzakis, John; Klini, A.; Zorba, V.; Androulakis, J.; Fotakis, C. (2003)
      In this work we investigate the surface morphology and stoichiometry of the ablated targets employed with pulsed laser deposition (PLD) of thin films of the ferromagnetic half-Heusler alloy NiMnSb. The NiMnSb targets were: ...
    • 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 ...