Browsing Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering by Author "Androulakis, J."

Now showing items 21-27 of 27

    • Article  

      Strong paramagnetism and possible ferromagnetism in pure carbon nanofoam produced by laser ablation 

      Rode, A. V.; Gamaly, E. G.; Christy, A. G.; Gerald, J. G. Fitz; Hyde, S. T.; Elliman, R. G.; Luther-Davies, B.; Veinger, A. I.; Androulakis, J.; Giapintzakis, John (2005)
      We report the production of a hierarchically nanostructured magnetic carbon foam by high-repetition-rate laser ablation of glassy carbon in Ar. The clusters contain both sp2 and sp3 bonded carbon atoms. The material contains ...
    • Article  

      Structural, magnetic, and electrical properties of NiMnSb thin films grown on InSb by pulsed-laser deposition 

      Gardelis, S.; Androulakis, J.; Giapintzakis, John; Monnereau, O.; Buckle, P. D. (2004)
      We report the growth of single-phase, stoichiometric polycrystalline thin films of the half-Heusler ferromagnet NiMnSb, predicted to be half-metallic, on single crystal InSb (100) substrates heated at 200°C by pulsed laser ...
    • 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 ...
    • Article  

      Thermoelectric properties of LaNi1-xCoxO3 solid solution 

      Migiakis, P.; Androulakis, J.; Giapintzakis, John (2003)
      The thermoelectric properties of the selected members of the LaNi 1-xCoxO3 solid solution were investigated. The electrical properties of the solution investigated were determined from the doping level. The substitution ...
    • 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 ...
    • Article  

      Unconventional magnetism in all-carbon nanofoam 

      Rode, A. V.; Gamaly, E. G.; Christy, A. G.; Gerald, J. G. Fitz; Hyde, S. T.; Elliman, R. G.; Luther-Davies, B.; Veinger, A. I.; Androulakis, J.; Giapintzakis, John (2004)
      We report production of nanostructured magnetic carbon foam by a high-repetition-rate, high-power laser ablation of glassy carbon in Ar atmosphere. A combination of characterization techniques revealed that the system ...