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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 1229-1232 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thermally stimulated current (TSC) measurements have been peformed on a layered organic photoconductor based on p-diethylaminobenzaldehyde diphenylhydrazone (DEH) dispersed in bisphenol A polycarbonate. Well-defined transient current peaks were observed, indicative of a hole transport process having an activation energy of ∼0.5 eV at an applied electric field of 10 V/μm. This TSC feature is attributed to carriers which are thermally activated from electron donor states associated with the DEH molecules responsible for transport in this medium. This transport peak is clearly distinguished from the higher temperature secondary structure which is attributed to trap states. Measurements of the steady-state photoconductivity over a range of temperatures also yield approximately the same activation energy for the transport process.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 5539-5542 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The structure and properties of NiFe-N films, prepared by rf reactive sputtering process using nitrogen in the range from 0 to 40% in the nitrogen-argon gas mixture during sputtering, have been studied. The concentration of nitrogen and the resistivity of the NiFe-N films were determined as a function of nitrogen partial pressure. Films with good soft magnetic properties were obtained when the nitrogen in the nitrogen-argon gas mixture during sputtering was in the range 0–10%. The resistivity of these films was low and x-ray diffraction results indicated only an fcc structure of γ-NiFe alloy. For films deposited with more than 10% of nitrogen in the gas mixture there is a transition region where resistivity and coercivity started to increase. Films deposited with 20% nitrogen mixed with argon consist of a mixture of γ-NiFe alloy and (Ni,Fe)4N phases. With further increase of nitrogen above 30% during sputtering, a (Ni,Fe)3N phase was observed. The resistivity and coercivity of these films were high.
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 2296-2299 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Studies of photogeneration of charge in polysilanes resulting from multiple pulse excitation in thermally stimulated current (TSC) measurements are reported. The amount of charge that was photogenerated at 80 K and collected during the heating of the sample up to 300 K, ranged from 1×10−9 to 4×10−8 C/cm2 for electric fields of 10–30 V/μm and illumination energy up to 2.5 mJ/cm2 and was found to be dependent both on the electric fields applied during illumination and thermal ramping and on the illumination energy. The results are compared to an idealized model that qualitatively describes for photogeneration of the charge at 80 K and its collection during the TSC measurement. According to this model, multiple pulse excitation at 80 K leads to a buildup of photogenerated charge density in the surface region of the sample and as the temperature is increased, electron-hole recombination occurs, limiting the amount of charge collected by the external circuit.
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  • 4
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 2192-2195 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Using controlled N2/Ar sputtering gas mixtures, rf-sputtered films were prepared from Fe, Ni, and Ni81Fe19 targets, and their structure and orientation were studied by x-ray diffraction. When no N2 was introduced during sputtering, all the films were oriented in the highest density planes; i.e., in (110), (111), and (111) for α-Fe, Ni, and γ-Ni81Fe19, respectively. With increasing N2 introduction, however, the orientation shifted to lower density planes, and eventually nitrides were formed. Multilayer films of metal and nitride were prepared with the Ni81Fe19 target by repetitive supply of N2 for short periods during sputtering. Strong orientation effects were observed depending on the number of layers grown. In addition, the x-ray diffraction of these films presented evidence of epitaxial growth of the nitrides (Ni,Fe)4N on the alloy layers.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 654-656 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ti/Ti-N, Hf/Hf-N, and W/W-N multilayer films with very thin individual metal and metal-nitride layers were developed, with hardness of the structure much higher than that of single-layer nitride films. Hardnesses with value between 3500 and 5000 kg/mm2 or higher were observed in the multilayer films. This is an improvement over that of single-layer metal-nitride films where hardnesses between 2200 and 2800 kg/mm2 are typically achieved. The improvement is thought to be due to the fact that the grains are restricted to a very small size in the thin individual layers of the sandwich structure. The multilayer films, in general, have better adhesion and less defects than the single-layer films. These films were prepared on room-temperature substrates by a simple sputtering process and have potential applications, as in hard coatings.
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  • 6
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 412-413 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A method of fabricating of Fe/Fe-N multilayer films in the form of alternating thin films of Fe separated by very thin interlayers of Fe-N sputtered in the presence of nitrogen is described. It was found that the properties of these films depended on the thickness of Fe and Fe-N layers and the bias voltage. There is a region where the composite films have coercivity less than 1 Oe, with zero or near-zero magnetostriction. The normally high saturation magnetization of Fe with value of 20 kG was preserved.
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  • 7
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 8 (1955), S. 88-91 
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 10 (1957), S. 14-18 
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 8 (1955), S. 806-810 
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 9 (1956), S. 621-626 
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
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