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  • 2000-2004  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Photoluminescence of Yb3+-doped CuInS2 crystals in magnetic fields (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 89 (2001), S. 2706-2710 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Single crystals of Yb3+-doped CuInS2 were isolated by an In-flux technique. The Yb3+ concentration is estimated to be 4.5×1019 cm−3 in terms of the Curie–Weiss behavior of magnetic susceptibilities. The intra-4f-shell transitions of Yb3+ were resolved at low temperatures by photoluminescence peaks at 1.2–1.25 eV. The Yb-related peak intensities are weak in comparison with those arising from defect and impurity centers in the host. The magnetic field dependence of photoluminescence spectra shows interesting differences among the Yb-related peaks, with only part of them being Zeeman split. An energy level scheme on the basis of a single type of Yb3+ center in a tetragonal crystal field is proposed to explain the temperature- and magnetic-field dependence of the optical spectra. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1341214
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Anisotropy of superconductivity from MgB2 single crystals (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 2779-2781 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnesium diboride (MgB2) single crystals, with a maximum size of 0.5×0.5×0.02 mm3, were grown by the vapor transport method in a sealed molybdenum crucible. A superconducting transition with the onset temperature of 38.6 K was confirmed by both transport and magnetization measurements. The upper critical field anisotropy ratio, Hc2(parallel)ab(0)/Hc2(parallel)c(0), was estimated to be 2.6 from the magnetic field-temperature phase diagram for MgB2 single crystals. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1413729
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  • 3
    Electronic Resource
    Electronic Resource
    Experimental aspects of an NMR quantum computer with CeP (2000)
    Springer
    Applied physics 70 (2000), S. 359-360 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 03.67.Lx; 76.60.-k; 75.50.Ee
    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 NMR quantum computer based on an integrated device with CeP has been proposed by Yamaguchi and Yamamoto [Appl. Phys. A 68 1 (1999)]. We point out two problems in their scheme. We also investigate experimentally the 31P NMR spectra for our CeP. From the line width, we find that improvement of the sample quality is necessary to satisfy the experimental conditions for a quantum computer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050060
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    Paper (German National Licenses)
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