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  • 1
    Electronic Resource
    Electronic Resource
    The effect of crystallography on the Hg 5d branching ratios (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 2819-2826 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The Hg 5d5/2 and 5d3/2 cross sections and branching ratios were measured in the photon energy range between 26 and 105 eV for Hg overlayers on Ag (100) and Cu (100). The branching ratios deviate from the nonrelativistic statistical value of 1.5, reaching values of 8.0. Data are presented that establish a direct relationship between the branching ratio and the long-range crystallographic structure of the Hg overlayers. This relationship is a consequence of the formation of a band structure from the shallow mercury 5d eigenstates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.458867
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Multichannel detection high-resolution electron energy loss spectrometer (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 3139-3150 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new general-purpose high-resolution electron energy loss spectrometer has been constructed and tested. Novel features of the electron optics include multichannel energy detection and tandem four-element zoom lenses that incorporate beam defining apertures. Compact design of the lenses permit scattering measurements in which the total scattering angle is less than 40°. This feature permits probing bulk phonon modes. The lens system permits electronic adjustment of the analyzer collection angle, and yields high transmission at retardation/acceleration ratios of 400:1. Performance characteristics include simultaneous detection of 50 energy channels at 4-meV energy resolution and target currents exceeding 2×10−10 A. Separate monochromator and analyzer goniometers permit access to out-of-plane scattering configurations which enables probing odd symmetry shear surface modes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140545
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of surface atomic steps on in-plane magnetic anisotropy of ultrathin Fe films on W(001) : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 6751-6753 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Previous magneto-optic Kerr effect studies of ultrathin epitaxial Fe films grown on stepped W(001) surfaces yielded evidence of in-plane uniaxial magnetic anisotropy with magnetization perpendicular to the steps. We report spin-polarized secondary electron emission spectroscopy studies of the same system that confirms this novel micromagnetic phenomena, and provides a more detailed characterization of the zero-field in-plane spin configuration as a function of initial applied field direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352474
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    New opportunities in spin-polarized photoemission spectroscopy (invited) (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 5699-5703 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: New opportunities for probing magnetism and magnetic materials are emerging as a result of improved electron-spin detectors, broad advances in materials synthesis and characterization techniques, and refinements in spin-sensitive spectroscopic techniques. A multi-investigator group is currently commissioning a spin-polarized photoemission beamline at the National Synchrotron Light Source that has been designed to synthesize and study magnetic materials. The beamline exploits the significant increase in synchrotron radiation flux that is emitted from a magnetic insertion device. Key issues and new opportunities for advancing the understanding of magnetism and magnetic materials using this facility are addressed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345935
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  • 5
    Electronic Resource
    Electronic Resource
    Development of the Gd(0001) band structure with film thickness : The 5th Joint MMM−Intermag Conference (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 6565-6567 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By growing gadolinium films on W(110), it has been possible to observe the development of the Gd(0001) band structure with increasing film thickness. The changes in the 5d bands as a result of exposure to oxygen or the development of the valence-band structure with increasing film thickness lead to changes in the 5p multiplet oscillator strengths. These changes are a result of the influence of the band structure upon the final-state effects that give rise to such multiplet structures. This study provides conclusive evidence that there is a 5d contribution to the shallow 5p multiplet photoemission core-level structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349858
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  • 6
    Electronic Resource
    Electronic Resource
    Adapting a compact Mott spin polarimeter to a large commercial electron energy analyzer for spin-polarized electron spectroscopy (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 3474-3479 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A modified Rice University-type compact Mott spin polarimeter operating at 20 kV is adapted to a large commerical hemispherical electron energy analyzer. Normal energy analyzer functions are preserved via a retractable channeltron in the polarimeter acceleration column. In the spin-detection mode, the polarimeter permits analysis of two orthogonal transverse spin-polarization components. Electron trajectory analysis is used to optimize polarimeter lens column voltages in both normal and spin-detection modes. Performance levels are established by experiments and significantly improved spin-detection efficiency is shown to be accessible by changes in the polarimeter collection solid angle.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144270
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  • 7
    Electronic Resource
    Electronic Resource
    Analysis of microchannel plate response in relation to pulsed laser time-of-flight photoemission spectroscopy (1991)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 62 (1991), S. 1246-1255 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Design considerations, construction details, performance evaluation, and experimental tests of a time-of-flight photoelectron spectrometer utilizing a pulsed laser source are presented. The new spectrometer has been designed for heat transport and carrier dynamics studies of solid surfaces using femtosecond laser excitation. Special attention is directed to analysis of the dynamic range and linearity of the detector in order to obtain quantitative information from measured electron yields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142007
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  • 8
    Electronic Resource
    Electronic Resource
    A high current pulse generator for magnetizing thin magnetic films (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 3948-3950 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A bipolar, high-current (10 000 A) pulse generator, used to magnetically saturate thin films during spin-polarized electron and dynamic response measurements, is described. Bipolar operation is achieved by discharging a bank of capacitors through selected pairs of high-power silicon-controlled rectifiers connected to a coil in an H bridge configuration. The pulse generator can be controlled either manually or by means of a computer. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147296
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  • 9
    Electronic Resource
    Electronic Resource
    Low-energy-electron-diffraction system using a high-performance electron gun and position-sensitive detectors (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 1883-1887 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new low-energy-electron-diffraction (LEED) instrument is described that combines resistive-anode-based position-sensitive detectors with a high-resolution electron gun capable of producing a beam having high spatial coherence (large instrument transfer width). The system produces digitized images of LEED patterns as well as high-resolution spot profiles of individual beams using incident currents in the picoampere range, thus vastly reducing or eliminating electron beam damage to sensitive surfaces. The display resolution of both spot profile and full display images is 1024×1024 channels, and the dynamic range is 16 bits (≈104) per channel. The resistive anode pulse processing electronics limits maximum data acquisition rates to 1×106 s−1. Specially developed software permits manipulation and numerical processing of the digitized two-dimensional images at full resolution to produce spot contour maps, spot line profiles along arbitrary directions, Fourier transforms of spot profiles, integrated spot intensities, and intensity vs voltage curves with suitably subtracted background.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143971
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  • 10
    Electronic Resource
    Electronic Resource
    A simple substitute for Knudsen cells using an existing pendant-drop type electron beam evaporator (1991)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 62 (1991), S. 2288-2288 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple and elegant technique is outlined in which a specially designed crucible may be used for noble metal evaporation in a pendant-drop type electron beam evaporator with virtually no modifications.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142351
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    Paper (German National Licenses)
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