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  • American Institute of Physics (AIP)  (4)
  • 2000-2004  (2)
  • 1990-1994  (2)
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  • 1
    Digitale Medien
    Digitale Medien
    Ultraviolet inverse photoemission spectrograph with parallel multichannel isochromat acquisition (1991)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 62 (1991), S. 639-642 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A simple and cost effective inverse photoemission spectrograph based on a spherical grating with very large optical acceptance ( f/2.8) is described. The system works in the 10–25 eV photon energy range. The dispersed photons are detected by a detector assembly based on a microchannelplate and consisting of twelve independent channels. Measurements are taken in the isochromat mode by sweeping the impinging electron energy, and the acquisition of the twelve channels is done in parallel. As an example of the apparatus performances data on polycrystalline Pt are presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1142062
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  • 2
    Digitale Medien
    Digitale Medien
    New calibration procedure for an inverse photoemission spectrograph (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 4469-4470 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A new calibration procedure for determining the instrumental efficiency of a grating-based inverse photoemission spectrograph is described. Our results are in good agreement with those obtained by following another procedure previously adopted by other authors. The new procedure is particularly convenient for inverse photoemission experiments conducted in the so-called "isochromat'' mode.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1143703
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  • 3
    Digitale Medien
    Digitale Medien
    A double coil apparatus for Barkhausen noise measurements (2001)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 72 (2001), S. 2058-2061 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: A pickup coil wound around the sample is the standard method for Barkhausen noise (BN) measurements. Here we describe an apparatus where two coils are used instead of one. The relative position of the coils can be changed and this allows the experimental investigation of spatial correlation effects in BN. The signals induced in the coils are very similar when the coils are placed nearby whereas a progressive decrease of their correlation is observed by moving the coils apart. We tested our system on a ribbon of amorphous Fe63B14Si8Ni15 100 mm long. For a distance between the coils of 40 mm the signal correlation is nearly vanished. © 2001 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1353193
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  • 4
    Digitale Medien
    Digitale Medien
    A focused magneto-optical Kerr magnetometer for Barkhausen jump observations (2000)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 1752-1755 
    Details
    ISSN: 1089-7623
    Quelle: AIP Digital Archive
    Thema: Physik , Elektrotechnik, Elektronik, Nachrichtentechnik
    Notizen: We describe a modified version of a magneto-optical Kerr magnetometer which allows measuring the hysteresis loop of a specific portion of the sample surface. The diameter of the sampled area can be optically tuned from several mm down to 15 μm. High quality hysteresis loops can be measured in a few seconds. Strong fluctuations are observed when the spot diameter is reduced to a few hundred microns or less. These fluctuations are related to the well-known Barkhausen noise here investigated for the first time in a systematic way using optical techniques. Preliminary data for epitaxial Fe grown on MgO are presented. © 2000 American Institute of Physics.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1063/1.1150532
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