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Träfflista för sökning "WFRF:(Mathieu V.) srt2:(2000-2004)"

Sökning: WFRF:(Mathieu V.) > (2000-2004)

  • Resultat 1-7 av 7
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1.
  • Tseggai, Mehreteab, et al. (författare)
  • Magnesium Substitution in Nd0.7Sr0.3MnO3
  • 2004
  • Ingår i: J. Solid State Chemistry. ; 177, s. 966-971
  • Tidskriftsartikel (refereegranskat)abstract
    • Magnesium substitution in Nd0.7Sr0.3MnO3 has been studied by neutron powder diffraction. Polycrystalline samples of nominal compositions Nd0.7Sr0.3Mn1−yMgyO3 with y=0.0, 0.1, 0.2 and 0.3 were synthesized by the standard solid-state reaction method. Rietveld refinements of the neutron powder diffraction data showed that all samples had distorted perovskite structure of orthorhombic symmetry. Mg initially preferred to substitute for Nd and only at Mg concentration greater than 0.1, a substantial substitution for Mn occurred. Our study also showed that Mg-substitution did not change the crystal structure of Nd0.7Sr0.3MnO3.
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  • Adell, M, et al. (författare)
  • Photoemission studies of the annealing-induced modifications of Ga0.95Mn0.05As
  • 2004
  • Ingår i: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121. ; 70:12: 125204
  • Tidskriftsartikel (refereegranskat)abstract
    • Using angle resolved photoemission we have investigated annealing-induced changes in Ga1-xMnxAs with x=0.05. We find that the position of the Fermi energy is a function of annealing time and temperature. It is also established that the Curie temperature is strongly correlated to the separation between the Fermi level and the valence band maximum. Valence band photoemission shows that the Mn3d spectrum is modified by the annealing treatments.
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  • Hariz, Marwan I, et al. (författare)
  • A quick and universal method for stereotactic visualization of the subthalamic nucleus before and after implantation of deep brain stimulation electrodes
  • 2003
  • Ingår i: Stereotactic and Functional Neurosurgery. - : S. Karger AG. - 1011-6125 .- 1423-0372. ; 80:1-4, s. 96-101
  • Tidskriftsartikel (refereegranskat)abstract
    • For deep brain stimulation (DBS) of the subthalamic nucleus (STN), it would be an advantage if the STN could be visualized with fast acquisition of MR images, allowing direct and individual targeting. We present a protocol for T2-weighted, nonvolumetric fast-acquisition MRI, implemented at 8 centers in 6 countries. Acquisition time varied between 3 min 5 s and 7 min 48 s according to the center, and imaging often provided visualization of the STN on axial and coronal scans. Postoperatively, the same imaging protocol permitted visualization of the target area and DBS electrodes with minimum artifacts. This imaging technique may contribute to a decrease in the number of electrode passes at surgery.
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  • Resultat 1-7 av 7

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