Search Results - (Author, Cooperation:D. Elbaz)

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  1. 1
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Latest Papers from Table of Contents or Articles in Press
  3. 3
    Staff View
    Publication Date:
    2012-06-16
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  4. 4
    Elbaz, D. ; Givord, D. ; Hirosawa, S. ; Missell, F. P. ; Rossignol, M. F. ; Villas-Boas, V.

    [S.l.] : American Institute of Physics (AIP)
    Published 1991
    Staff View
    ISSN:
    1089-7550
    Source:
    AIP Digital Archive
    Topics:
    Physics
    Notes:
    The angular dependence of the coercive field Hc(cursive-theta) is discussed as a means of studying magnetization reversal in permanent magnets. We consider Hc(cursive-theta) for permanent magnets RFeB (R=Pr, Nd) for temperatures between 4.2 and 300 K. At high temperatures, it is found that Hc may increase by a factor 1.5–2 as cursive-theta increases from 0 to π/2. At low temperatures, in the Pr magnets, Hc decreases as cursive-theta increases from 0 to π/4 and then increases for larger angles. Different possible mechanisms for magnetization reversal are considered and the associated angular dependences of the coercive field in single crystals are calculated. The corresponding Hc(cursive-theta) are deduced for permanent magnets from the grain orientation distribution. Better agreement with experimental data is obtained in models involving domain-wall propagation and leading to a 1/cos cursive-theta dependence, or close to it, than in models involving coherent rotation. The behavior of the PrFeB magnets is not explained.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  5. 5
    Aussel, H. ; Elbaz, D. ; Cesarsky, C. J.
    Springer
    Published 1999
    Staff View
    ISSN:
    1572-946X
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract Several deep surveys have been performed at 7 and 15 μm by using the mid-infrared camera ISOCAM on board the ISO satellite. We review their first results, emphasizing on the excess detected in the 15 μm counts with respect to the predictions of models with a mild evolution that is sufficient to explain the IRAS counts. We point out that a large fraction of the past star formation history is missed when studied using UV/visible data only.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  6. 6
    Staff View
    ISSN:
    1572-9508
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Physics
    Notes:
    Abstract We discuss the instrumental factors which constrain the sensitivity limits of the mid-infrared camera (ISOCAM) of ESA's Infrared Space Observatory (ISO). The observing strategy judged to be best suited to faint-source detection is described. A data analysis technique adapted to the extraction of the faintest point-sources is discussed. We report the application of these techniques to an extremely deep mid-IR observation of high redshift gravitationally lensed objects, in two filters, looking through a lensing galaxy cluster.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses