Now showing items 7-15 of 15

    • High-Jc MgB2 Josephson junctions with operating temperature up to 40 K 

      Chen, Ke; Zhuang, C. G.; Li, Q.; Zhu, Y.; Voyles, P. M.; Weng, X.; Redwing, J. M.; Singh, R. K.; Kleinsasser, A. W.; Xi, X. X. (2010)
      Sandwich-type MgB2 /MgO/MgB2 Josephson junctions with Au or MgB2 interconnection were fabricated using hybrid physical-chemical vapor deposited MgB2 thin films and RF-magnetron-sputtered MgO barrier. The junctions show ...
    • Impurity distribution and microstructure of Ga-doped ZnO films grown by molecular beam epitaxy 

      Kvit, A. V.; Yankovich, A. B.; Avrutin, V.; Liu, H.; Izyumskaya, N.; Ozgur, U.; Morkoc, H.; Voyles, P. M. (2012)
      We report microstructural characterization of heavily Ga-doped ZnO (GZO) thin films on GaN and sapphire by aberration-corrected scanning transmission electron microscopy. Growth under oxygen-rich and metal-rich growth ...
    • Increasing medium-range order in amorphous silicon with low-energy ion bombardment 

      Gerbi, J. E.; Voyles, P. M.; Treacy, M. M. J.; Gibson, J. M.; Abelson, J. R. (2003)
      We have observed the existence of medium?range order in amorphous silicon with the fluctuation electron microscopy technique. We hypothesize that this structure is produced during the highly nonequilibrium deposition ...
    • Morphology and crystallization kinetics in HfO2 thin films grown by atomic layer deposition 

      Ho, M.-Y.; Gong, H.; Wilk, G. D.; Busch, B. W.; Green, M. L.; Voyles, P. M.; Muller, D. A.; Bude, M.; Lin, W. H.; See, A.; Loomans, M. E.; Lahiri, S. K.; Raisanen, Petri I. (2003-02)
      We report the effects of annealing on the morphology and crystallization kinetics for the high-k gate dielectric replacement candidate hafnium oxide (HfO2). HfO2 films were grown by atomic layer deposition (ALD) on thermal ...
    • Nanoscale Structure and Relaxation in Zr50Cu45Al5 Bulk Metallic Glass 

      Voyles, P. M.; Stone, D. S.; Kramer, M. J.; Kalay, I.; Kalay, Y. E.; Melgarejo, Z. H.; Hwang, Jinwoo (2012-05-11)
      Hybrid reverse Monte Carlo simulations of the structure of Zr50Cu45Al5 bulk metallic glass incorporating medium-range structure from fluctuation electron microscopy data and short-range structure from an embedded atom ...
    • Structural disorder induced in hydrogenated amorphous silicon by light soaking 

      Gibson, J. M.; Treacy, M. M. J.; Voyles, P. M.; Jin, H-C.; Abelson, J. R. (1998)
      We show, using variable coherence transmission electron microscopy, that light soaking of amorphous hydrogenated silicon thin films leads to structural changes. We speculate that the structural changes are associated with ...
    • Structural, optical, and magnetic characterization of monodisperse Fe-doped ZnO nanocrystals 

      Parra-Palomino, A.; Perales-Perez, O.; Singhal, R.; Tomar, M.; Hwang, Jinwoo; Voyles, P. M. (2008)
      The results on the synthesis and characterization of highly monodisperse Fe-doped ZnO nanocrystals are presented. Stable suspensions of these materials were produced in an ethanol solution at room temperature. To promote ...
    • Structure and physical properties of paracrystalline atomistic models of amorphous silicon 

      Voyles, P. M.; Zotov, N.; Nakhmanson, S. M.; Drabold, D. A.; Gibson, J. M.; Treacy, M. M. J.; Keblinski, P. (2001)
      We have examined the structure and physical properties of paracrystalline molecular dynamics models of amorphous silicon. Simulations from these models show qualitative agreement with the results of recent mesoscale ...
    • Tuning of magnetic properties in cobalt ferrite nanocrystals 

      Cedeno-Mattei, Y.; Perales-Perez, O.; Tomar, M. S.; Roman, F.; Voyles, P. M.; Stratton, W. G. (2008)
      Cobalt ferrite CoFe2O4 possesses excellent chemical stability, good mechanical hardness, and a large positive first order crystalline anisotropy constant, making it a promising candidate for magneto-optical recording ...