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  • 1
    Electronic Resource
    Electronic Resource
    A laser-ablation system for deposition of high-temperature superconducting thin films for device applications (1999)
    Springer
    Applied physics 69 (1999), S. S451 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 81.15.Fg; 74.76.Bz; 85.25.-j
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. We present a compact-size laser-ablation system to produce high-temperature superconducting (HTS) YBa2Cu3O7-δ (YBCO) thin films for component applications. The system has been designed for deposition of multilayer structures on 5-cm-diameter substrates and for reliable operation with reduced need for maintenance. The performance of the system has been studied by depositing YBCO films on small LaAlO3 substrates. The films have critical temperatures of 88–90 K and critical current densities of 0.9–4.5 MA/cm2 as measured with an inductive technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051436
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Time-dependent absorption of gamma-radiation under high-frequency magnetic excitation of57Fe (1996)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 18 (1996), S. 385-388 
    Details
    ISSN: 0392-6737
    Keywords: Mössbauer effect ; other ψ-ray spectroscopy ; Strong field excitation of optical transitions in quantum systems multiphonon processes ; dynamic Stark shift ; Effects of internal magnetic fields ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We have studied the time dependence of Mössbauer absorption in a magnetically soft sample of Fe18Ni82 permalloy under the influence of a radio-frequency (r.f.) magnetic field. Absorption was measured as a function of the r.f. field phase at specific gamma-ray energies. We have shown that measuring the time dependence of absorption makes it possible to differentiate between purely magnetic and magnetoacoustic modulation mechanisms even in cases where clear distinction is not visible in conventional energy domain spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02458923
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Registration and display of brain SPECT and MRI using external markers (1996)
    Springer
    Neuroradiology 38 (1996), S. 108-114 
    Details
    ISSN: 1432-1920
    Keywords: Brain single-photon emission tomography ; Image fusion ; Multimodality imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Accurate anatomical localisation of abnormalities observed in brain perfusion single-photon emission computed tomography (SPECT) is difficult, but can be improved by correlating data from SPECT and other tomographic imaging modalities. For this purpose we have developed software to register, analyse and display99mTc-hexamethylpropyleneamine oxime SPECT and 1.0 T MRI of the brain. For registration of SPECT and MRI data external skin markers containing99mTc (220 kBq) in 50 μl of coconut butter were used. The software is coded in the C programming language, and the X Window system and the OSF/Motif standards are used for graphics and definition of the user interface. The registration algorithm follows a noniterative least-squares method using singular value decomposition of a 3×3 covariance matrix. After registration, the image slices of both data sets are shown at identical tomographic levels. The registration error in phantom studies was on average 4 mm. In the two-dimensional display mode the orthogonal cross-sections of the data sets are displayed side by side. In the three-dimensional mode MRI data are displayed as a surface-shaded 3 D reconstruction and SPECT data as cut planes. The usefulness of this method is demonstrated in patients with cerebral infarcts, brain tumour, herpes simplex encephalitis and epilepsy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00604791
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    Paper (German National Licenses)
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