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  • 1
    Electronic Resource
    Electronic Resource
    Effect of temperature on the validity of the einstein relation in heavily doped semiconductors (1980)
    Springer
    Applied physics 23 (1980), S. 241-244 
    Details
    ISSN: 1432-0630
    Keywords: 72.20 ; 85.30
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract An analytical expression of the modified form of the Einstein relation in heavily doped semiconductors in which Gaussian band tails are formed near the lower limit of heavy doping is derived for studying the temperature dependence of the diffusivity-mobility ratio of the carriers in such semiconductors. It is found that, with increasing temperature from relatively low values, the ratio first increases in a nonlinear manner and then decreases till, at high temperatures, it approaches its value corresponding to the non-degenerate condition resulting in a peak over a narrow range of temperatures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00914906
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Oscillatory effective mass in degenerate narrow-gap semiconductors in a quantizing magnetic field (1981)
    Springer
    Applied physics 25 (1981), S. 105-108 
    Details
    ISSN: 1432-0630
    Keywords: 85.30 ; 72.20 ; 72.15
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract An attempt is made to study the effect of a quantizing magnetic field on the effective electron mass in degeneraten-type narrow-gap semiconductors at low temperatures. It is found, takingn-Hg1−x Cd x Te as an example, that the effective electron mass shows an oscillatory magnetic-field dependence as is expected because of the dependence of the effective mass in degenerate non-parabolic bands on Fermi energy which oscillates with changing magnetic field. The amplitude of oscillations is, however, found to be significantly influenced by the alloy composition whereas the period is found to be independent of the band non-parabolicity, i.e. of the compositional parameter in ternary semiconductors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00901280
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  • 3
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    Spin pumping damping and magnetic proximity effect in Pd and Pt spin-sink layers (2016)
    American Physical Society (APS)
    Details
    Publication Date: 2016-07-13
    Description: Author(s): M. Caminale, A. Ghosh, S. Auffret, U. Ebels, K. Ollefs, F. Wilhelm, A. Rogalev, and W. E. Bailey Ultrathin films of the heavy elements Pd and Pt are widely used in spintronics as converters between charge and spin currents and vice versa. One open question has been whether the strongly paramagnetic nature of these elements influences the interconversion process. The authors show, using a combination of ferromagnetic resonance and x-ray magnetic circular dichroism measurements, that a related spin current absorption process (spin pumping damping) responds to the presence of ferromagnetic order in the polarizable Pd and Pt layers. They observe a change in the thickness dependence of spin current absorption when the Pd and Pt layers are in direct contact with a ferromagnet, compared with when they are in indirect contact. This change correlates with the presence of induced magnetic moments in Pd and Pt as revealed by element-specific x-ray magnetic circular dichroism magnetometry. The results show that the decoherence process for spin current in such layers is not independent of geometry, but rather is influenced by the presence of induced ferromagnetic order. [Phys. Rev. B 94, 014414] Published Tue Jul 12, 2016
    Keywords: Magnetism
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 4
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    Spin-cluster excitations in the rare-earth kagome system Nd_{3}Ga_{5}SiO_{14} (2014)
    American Physical Society (APS)
    Details
    Publication Date: 2014-12-04
    Description: Author(s): S. Ghosh, S. Datta, H. Zhou, M. J. R. Hoch, C. R. Wiebe, P. Schlottmann, and S. Hill Spin-cluster excitations induced by microwave radiation have been detected as a function of an applied magnetic field in the rare-earth kagome system Nd 3 Ga 5 SiO 14 . The results are interpreted using a Heisenberg model which allows for anisotropic exchange interactions between neighboring spins. At a m... [Phys. Rev. B 90, 224405] Published Wed Dec 03, 2014
    Keywords: Magnetism
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 5
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    Pd magnetism induced by indirect interlayer exchange coupling (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-10-09
    Description: Author(s): W. E. Bailey, A. Ghosh, S. Auffret, E. Gauthier, U. Ebels, F. Wilhelm, and A. Rogalev We show that very large paramagnetic moments are created in ultrathin Pd layers through indirect interlayer exchange coupling. Pd L -edge x-ray magnetic circular dichroism measurements show Pd moments in [Pd(2.5 nm)/Cu(3 nm)/Ni 81 Fe 19 (5 nm)/Cu(3 nm)] 20 superlattices, which are ferromagnetically aligne... [Phys. Rev. B 86, 144403] Published Mon Oct 08, 2012
    Keywords: Magnetism
    Print ISSN: 1098-0121
    Electronic ISSN: 1095-3795
    Topics: Physics
    Published by American Physical Society (APS)
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  • 6
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    An investigation into some problems in analytical processing of lunar orbiter photography (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Problems in analytical processing of lunar orbiter photography are discussed. The effects of image motion and image motion compensation on the location of the principal point are analyzed. The effect of the focal plane shutter on the distortion and interior geometry is examined. Real data is used to confirm the workability of a mathematical model and the use of a computer to calibrate spaceborne photographic imagery.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA-CR-128279 , REPT-169
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Image quality against metric capability of an aerial camera (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Glass plate targets containing multiple contrast three bar patterns and a military standard resolution target were photographed through a light-source collimator-camera system. The glass plate targets and images were then scanned. Through a computer plotting program selected portions of the scanned items were presented. The plots were then measured and analyzed to obtain information of image quality parameters and effects. The measurement errors are discussed together with aspects of resolution determination.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Annual Meeting of the American Society of Photogrammetry; Mar 11, 1973 - Mar 16, 1973; Washington, DC
    Format: text
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